WBBSE Solutions For Class 8 School Science Chapter 1 Physical Environment Force And Pressure Short Answer Questions

Chapter 1 Physical Environment Short Answer Questions

 

Question 1. What is meant by 1 Newton force?
Answer:

1 Newton Force:-

The force which produces an acceleration of 1 m/s² when it acts on a mass of 1 kilogram is 1 Newton.

Question 2. What do you mean by force? What is its SI unit?
Answer:

Force:

Force is an agent acting on a body that actually changes the state of rest or uniform motion of the body.

The SI unit of force is Newton.

Force And Pressure

Question 3. A body kept on the surface of the table, just tends to move when it is pushed with a force of 5N. Based on this, complete the following table:
Answer:

Force   The magnitude of frictional force 
A. Zero
B. 2N

 

What is the limiting value of static friction in this case?
Magnitudes of frictional force:

  1. zero
  2. 2N

Since the body just tends to move when 5N force is applied, hence limiting (or maximum) value of static friction is 5N.

Question 4. What do you mean by frictional force?
Answer:

Frictional Force:-

Whenever the surface of one body is sliding over the surface of another body, each body exerts a force on one another.

This force on each body is always in the direction opposite to its motion relative to the other body and it acts in parallel to the surfaces in contact. This force is called frictional force.

Question 5. What do you mean by the force of static friction?
Answer:

Force Of Static Friction:

The frictional forces operating between the two surfaces at rest with respect to each other are called forces of static friction.

Question 6. What do you mean by force of kinetic friction?
Answer:

Force Of Kinetic Friction:-

The frictional forces operating between surfaces in relative motion are called forces of kinetic friction or forces of sliding friction.

Question 7. Mustard oil floats on water. Which one has greater density among mustard oil or water? Compute the pressure exerted by a 500g mass when it is placed on a table on its side having an area of 0.4 sqm. (g = 9.8m/s2).

Answer:

Water has a greater density than mustard oil.
Pressure = Force / Area = mxg= kg x 9.8 m/s²
Force= mx g=500/1000kgx 9.8m/s²
Pressure = 4.9/0.4 = 12.25 N= 12.25 N/m² (or Pa).

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Question 8. State two advantages of frictional force.
Answer:

Two advantages of frictional forces are:

We can stand and walk or run easily on a surface due to the presence of frictional forces. An automobile can smoothly run on the road due to this force.

If the roads were very smooth, the frictional force would have reduced considerably, and then controlling the movement of the automobile would have been difficult.

We can hold various things in our hands due to the existence of frictional forces which exists between the object and our hand. In absence of frictional forces, we could not have gripped any object properly.

Question 9. State two disadvantages of frictional force. Two disadvantages of frictional forces are:
Answer:

Disadvantages Of frictional force:-

When an object moves over a surface, for example, a car is moving on the road, it feels frictional forces that always try to reduce its velocity.

So to maintain a steady velocity, additional expenditure of energy is required. Some machine parts experience frictional forces during their operation.

As a result machine parts suffer wear and tear, and they have to be replaced from time to time. Thus maintenance cost of such machines increases.

Question 10. What do you mean by the density of a substance? What is its CGS and SI unit?
Answer:

Density of a substance:-

The quantity of matter (mass) contained in a unit volume of a substance is called the density of that substance.
Density = mass/volume
The unit of density in CGS unit is gram per cubic centimeter (g/cc), and in SI unit is kilogram per cubic meter (kg/m³).

Question 11. The density of a liquid is 10 kg/liter. Express it in the g/cc unit.
Answer:

1 litre of water = 1000 cc of water
and, 10 kg of water = 10000 g of water
So, the density of water = 10 kg/liter = 10000g/1000cc=10g/cc.

Question 12. What do you mean by the pressure of a liquid? Write its CGS and SI unit.
Answer:

Pressure of a liquid:-

The pressure of a liquid is the force exerted by the liquid per unit area of the surface, acting perpendicularly on it.

The CGS unit of pressure is dyne/cm² and the SI unit of pressure is N/m² (or Pascal).

Question 13. What are the characteristics of pressure exerted by a liquid?
Answer:

Characteristics of pressure exerted by a liquid:-

The characteristics of pressure exerted by a liquid are the following:

Pressure at a point inside a liquid depends on the density of the liquid. Pressure at a point within a liquid increases with depth.

So long as the depth remains the same, the pressure exerted by a liquid is the same in any direction. In other words, liquid exerts pressure evenly in all directions at a given depth.

Question 14. A man is standing on the ground. What are the action-reaction forces in this case?
Answer:

When a person is standing on the floor, the person is exerting a force on the floor by virtue of his weight acting vertically downward.

According to Newton’s third law, the floor is also exerting an equal amount of force on the person. If the former is called action, the latter is the reaction force.

Question 15. What do you mean by buoyant forces?
Answer:

Buoyant Forces:-

When an object is immersed in a liquid, partially or completely, it experiences an upward force called “buoyant force”. As the object is immersed in a liquid, it displaces some volume of liquid and occupies that position.

The weight of the displaced liquid is equal to the magnitude of this upward force or buoyant force. This buoyant force is responsible for a decrease in the weight of the object when it is immersed in a liquid.

Question 16. A solid object always weighs less in water than in air. Explain.
Answer:

Given:

A solid object always weighs less in water than in air

When a solid object is immersed in a liquid, partially or completely, it experiences an upward force called “buoyant force”.

When the object is immersed in a liquid, it displaces some volume of liquid and occupies that position.

The weight of the displaced liquid is equal to the magnitude of this upward force or buoyant force. This buoyant force is responsible for making the weight of the object less than its weight in the air.

Question 17. State Archimedes’ principle.
Answer:

Archimedes’ Principle:-

Archimedes’ Principle states that, when a solid object is immersed in a liquid (partially or completely), it experiences an upward buoyant force, which is equal to the weight of the liquid displaced by the immersed part of the object.

Question 18. Submarines are not allowed to sink beyond a certain depth in the sea. Why?
Answer:

Submarines are not allowed to sink beyond a certain depth in the sea.

A Submarine is a small warship capable of going down water, when necessary. We know that pressure exerted by a liquid at a point within it depends on the depth of that point.

The more the depth of that point more will be the more pressure exerted by the liquid. The body of a submarine is made to withstand a certain amount of pressure exerted by the liquid.

This is equivalent to a certain depth within the water. Beyond this depth, the pressure exerted by water is so large that the submarine cannot withstand it.

So sinking beyond a certain depth is not permissible.

Question 19. On what factors does the buoyancy of a liquid depend?
Answer:

Factors affecting buoyancy are the following:

The buoyant force increases as the volume of the object immersed in the liquid increases. The buoyant force is maximum when the object is completely immersed in the liquid.

As the density of the liquid increases, the buoyant force exerted by the liquid on the object also increases.

Question 20. A body has a volume of 10 cm³ and the density of its material is 8g/cm³. Find out whether the body would float or sink if it is completely immersed in water.
Answer:

Mass of the body = volume x density
M=10×8 = 80g
When completely immersed in water, the body displaces 10 cm³ (equal to its own volume) of water.
Mass of displaced water = volume of displaced water x density
= 10 cm³x 1g/cm³ = 10g.

Since the mass of the body is more than the mass of the displaced water, the weight of the body is greater than the buoyancy of the displaced water. Thus the body sinks in water.

Question 21. You are holding a 2kg mass. How much force do you experience in this condition and in which direction?
Answer:

The force experienced is the weight of the mass.
Weight = mg = 2 x 9.8 = 19.6 N (g = 9.8 m/s²)

The force is directed vertically downward towards the center of the earth.

Question 22. An object is kept on a table and it is pulled. The magnitude of the pulling force is increased until the object moves. Why does the object remain stationary till the pulling force attains a certain value? When does the object start to move?

Answer:

What kind of friction comes into play when a block of wood kept on cylindrical iron rods moves?
The object does not move because its motion is opposed by the force of static friction which acts in the opposite direction of the pulling force.

As the pulling force is increased, the friction also goes on increasing. Ultimately when the applied pulling force becomes equal to or a little more than the maximum frictional force or the limiting value of static frictional force, the object tends to move on the surface of the table.

The frictional force acting between two surfaces has a maximum value beyond which it cannot increase. This maximum value is called the limiting value of static friction.

The pulling force has to be greater than this limiting value of static friction in order to make the object move.

Rolling friction comes into play when a block of wood kept on cylindrical iron rods moves.

Question 23. A large bus and a car, both moving with the same velocity, have a head-on collision and both of them come to a halt after that.

  1. Which vehicle experiences the greater force of impact?
  2. During motion, which vehicle has greater momentum?
  3. Which vehicle experiences greater acceleration?

Answer:

From Newton’s third law, action and reaction are the same in magnitude. Therefore, both vehicles experience the same force of impact.

Since they were moving with the same velocity, the bus having greater mass had bigger momentum.
Acceleration, a= F/ m

For the same force of impact (F), if the mass of the car is small, the car would experience greater acceleration.

Question 24. Two metal plates A and B having the same breadth but different lengths I, and 12 respectively are placed at the same depth inside the water such that their breadth is held exactly in vertical positions.
Answer:

Find the ratio of pressure acting on A and B by water in this situation. As air bubbles rise from the bottom to the top of a water tank, the size of the bubbles increases. Why does it happen?

Since the pressure inside a liquid varies as the depth of the point from the free surface, hence both plates A and B would experience the same pressure as they are placed at the same depth inside water.

Hence the ratio of pressure acting on A and B by water is 1:1.

The pressure exerted by water on the bubbles decreases as the height of the water column above them decreases. Due to the decrease in pressure, the volume of bubbles tends to increase.

Question 25. When a body is immersed in water, it displaces 5 Kg of water. How much is the buoyant force acting on the body? (g = 9.8 m/s2).
Answer:

A given solid is weighed in the air using a spring balance. It is then weighed by immersing fully in each of the following three vessels containing water as shown. In which vessel the loss of weight will be maximum and why?

The buoyant force is the weight of displaced water.

Buoyant force = mxg=5×9.8=49 N Loss in weight does not depend on the shape of the vessel. Therefore, loss in weight will be equal in all three vessels marked 1,2, and 3.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Buoyant force

 

WBBSE Solutions For Class 8 School Science Chapter 1 Physical Environment Force And Pressure Very Short Answer Questions

Chapter 1 Physical Environment Force And Pressure VSAQ

 

Question 1. What is the unit of force in the SI and CGS units?
Answer:

The unit of force in the SI unit is Newton and CGS unit is done.

Question 2. What is the relation between force and acceleration?
Answer:

Force = mass x acceleration

Question 3. What do you mean by a force of 1 Newton?
Answer:

Force Of 1 Newton:-

This is the force that produces an acceleration of 1 m/s² when applied to an object of mass 1 kg.

Question 4. What do you mean by a force of 1 dyne?
Answer:

Force Of 1 dyne:-

This is the force that produces an acceleration of 1 cm/s² when applied to an object of mass 1g.

Question 5. From which law do we get an idea of inertia?
Answer:

From Newton’s first law we get an idea about inertia.

Question 6. What is the force exerted by a mass of 1 kg placed on the hand?
Answer:

The force exerted by a mass of 1 kg on our hand is 9.8 N.

Question 7. Which instrument is used to measure the weight of an object?
Answer:

A spring balance is used to measure the weight of an object.

Question 8. Do action and reaction force act on the same object?
Answer:

No, action and reaction force act on different objects.

Question 9. Which principle has been applied to make spring balance?
Answer:

If a force is applied, the spring is elongated in the direction of the applied force and the extension produced in a spring by a force is directly proportional to the applied force. This principle has been used to make spring balance.

Question 10. What do you mean by the density of a substance?
Answer:

Density Of A Substance:-

The density of a substance is the mass of a unit volume of that substance.

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Question 11. What is the CGS and SI unit of density?
Answer:

The CGS unit of density is g/cc and its SI unit is kg/m³.

Question 12. If there is a hole at the bottom of a boat, why does water enter through it?
Answer:

Due to an upward force at any point within the water, the water enters through the hole at the bottom of the boat.

Question 13. When a ball is thrown along the surface of the table, it ultimately stops after covering some distance. Why?
Answer:

When a ball is thrown along the surface of the table with an initial velocity, it stops ultimately, because of the frictional force exerted by the surface of the table which opposes the motion of the ball.

Question 14. If the density of a liquid is increased how it will affect the buoyant force?
Answer:

If the density of a liquid is increased its buoyant force will increase.

Question 15. Write the condition of floatation.
Answer:

Floatation:-

If the weight of the object is less than the weight of the liquid displaced by it when it is immersed in the liquid, then the object will float on the liquid.

Question 16. Which instrument is used to measure the air pressure?
Answer:

A barometer is used to measure air pressure.

Question 17. To supply water in urban areas which property of the liquid is utilized?
Answer:

A liquid seeks its own height. This property is utilized in supplying water from a storage tank in urban areas.

Question 18. What will be the acceleration produced if a force of 10N acts on a mass of 5 kg?
Answer:

Acceleration = Force/ mass 10N/5kg = 2m/s².

Question 19. A floating body is weightless – why?
Answer:

A floating body is weightless

When a body floats in a liquid, the buoyant force acting upward balances the weight of the body acting downwards.

In the state of floatation, the body appears to lose its weight totally and so it is said that a floating body is weightless.

Question 20. What is the relation between the pressure exerted by a liquid and its density?
Answer:

Pressure at a point inside a liquid varies directly with the density of the liquid.

Question 21. A body is floating with a part of it submerged in a liquid. What is the relation between the weight of the body and the weight of the displaced liquid?
Answer:

Following the condition of floatation, at equilibrium, the total weight of the body is equal to the weight of the liquid displaced by the submerged volume of the body.

Question 22. If a body does not move on the surface of a table even if it is pulled by a force, then what kind of opposing force act on the body?
Answer:

Static Friction

Question 23. A 5N force creates a pressure of 500 Pa when it acts on a surface. What is the area of the surface in square cm?
Answer:

Area = Force/Pressure =5N / 500 Pa =1 / 100m²= 100 x 100 / cm² = 100 cm².

Question 24. The reading of a spring balance shows 10g-wt when a solid is half immersed in water. What will be the reading of the spring balance when the solid is completely immersed in water?
Answer:

Less than 10g wt due to more buoyancy.

Question 25. A body kept on the floor, just tends to move when it is pulled with a force of 5N. What is the limiting force of static friction between the body and the floor?
Answer:

5N

Question 26. A car is moving towards the east. What will be the direction of frictional force acting on this car due to the surface of the road?
Answer:

Since friction always opposes the motion, Hence it will act towards the west.

Question 27. A body of mass 2kg is moving with a velocity of 15m/s. Find the momentum of the body.
Answer:

Given:

A body of mass 2kg is moving with a velocity of 15m/s.

Momentum = mass x velocity = 2kg x 15 m/s = 30 kg m/s.

Question 28. The same body is immersed in two liquids A and B in succession. The extent to which the body sinks in liquid B is less than that in liquid A. What can you conclude about the densities of two liquids from the observation?
Answer:

Since a denser liquid will produce more buoyancy hence more the density of the liquid, the less the body sinks in liquid. Thus the density of liquid B is more than the density of liquid A.

 

WBBSE Solutions For Class 8 School Science Chapter 1 Physical Environment Force And Pressure Review Questions

Chapter 1 Physical Environment Force And Pressure Review Questions MCQs

Question 1. Action and reaction forces

  1. Are not the same in magnitude
  2. Are equal in magnitude and opposite in direction
  3. Act in the same direction
  4. Cancel each other.

Answer: 2. Are equal in magnitude and opposite in direction

Question 2. A book is lying in a stationary condition on the table. The book is stationary because

  1. The weight of the book and the normal reaction is oppositely directed
  2. The force of friction is absent
  3. The weight of the book is more than the normal reaction
  4. There is no external force acting on the book.

Answer: 2. There is no external force acting on the book.

Question 3. The relation between force (f) which produces an acceleration on an object of mass (m) is

  1. A = f/m
  2. A = m/f
  3. F=m/a
  4. A = f.m

Answer: 1. A = f/m

Question 4. Using a spring balance, we measure

  1. The mass of an object
  2. The weight of an object
  3. The pressure of an object
  4. The buoyancy on an object

Answer: 2. The weight of an object

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Question 5. If the area of contact between two surfaces is increased, the magnitude of frictional force will

  1. Increase
  2. Decrease
  3. Remain same
  4. Vanish

Answer: 2. Decrease

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Question 6. The mass of an object is 1 kg. The weight of that object is

  1. 1 N
  2. 9.8 n
  3. 9.8 dyne
  4. 9.8 kg

Answer: 2. 9.8 n

Question 7. If the action-reaction force which acts vertically between two surfaces is increased, the frictional force will

  1. Increase
  2. Remain same
  3. Decrease
  4. Vanish

Answer: 1. Increase

Question 8. The weight of an object is 30 kg in air and 25 kg in water. What is the weight of water displaced by the object when it is immersed in water?

  1. 30 Kg
  2. 25 Kg
  3. 5 Kg
  4. None of these

Answer: 3. 5 Kg

Question 9. When completely immersed in water, the weight of an object is 30 kg and the weight of water displaced by it is 15 kg. The weight of that object in air is

  1. 45 Kg
  2. 30 Kg
  3. 15 Kg
  4. None of these

Answer: 1. 45 Kg

Question 10. When the density of a liquid increases, the pressure exerted by the liquid at any point within it

  1. Increases
  2. Decreases
  3. Remains unchanged
  4. Becomes zero

Answer: 1. Increases

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Question 11. If the depth of a point within a liquid decreases, the pressure on that point exerted by the liquid

  1. Increases
  2. Decreases
  3. Remains unchanged
  4. Becomes zero

Answer: 2. Decreases

Question 12. The density of river water is

  1. More than that of seawater
  2. Less than that seawater
  3. Same as that of seawater
  4. None of these

Answer: 2. Less than that of seawater

Question 13. 1 Atmospheric pressure is equal to the pressure exerted by a column of mercury of height

  1. 76 M
  2. 76Cm
  3. 76 Mm
  4. 10.34m

Answer: 2. 76Cm

Question 14. The density of mercury is

  1. 13.6 kg/m³
  2. 13.6 g/litre
  3. 13.6 g/cc
  4. 13.6 kg/cc

Answer: 3. 13.6 g/cc

Question 15. The pressure exerted by air is measured by

  1. Hydrometer
  2. Barometer
  3. Calorimeter
  4. Speedometer

Answer: 3. Calorimeter

Question 16. The density of an object is

  1. Weight per unit area
  2. Force to produce unit acceleration
  3. Mass per unit length
  4. Mass per unit volume

Answer: 4. Mass per unit volume

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Question 17. The buoyant force acts in

  1. Upward direction
  2. Downward direction
  3. Laterally
  4. All directions

Answer: 1. Upward direction

Question 18. When immersed in water, if the weight of water displaced by the object is more than the weight of the object in the air, then the object will

  1. Float on water
  2. Sink in water
  3. Float anywhere inside the water
  4. None of these

Answer: 1. Float on water

Question 19. Pressure at a point within a liquid

  1. Acts in a downward direction only
  2. Acts in an upward direction only
  3. Acts in all directions
  4. Acts in lateral direction only

Answer: 3. Acts in all directions

Question 20. If the weight of a body in the air is w and the buoyancy of a liquid on it is b, then in which of the following cases will the body sink when immersed in the liquid?

  1. W=b
  2. W<b
  3. W>b
  4. In all the cases

Answer: 3. W>b

Question 21. In which of the following cases will a milk bottle exert maximum pressure on the table?

  1. Position – 1
  2. Position – 2
  3. Position – 3
  4. Same in all positions

Answer: 2. Position – 2

Question 22. Absence of which of the following forces would have caused difficulty in walking?

  1. Geomagnetic force
  2. Gravitational force
  3. Electrostatic force
  4. Frictional force

Answer: 4. Frictional force

Question 23. Two balls marked a and b have the same volume but the density of the material of b is more than that of a. The balls are completely immersed in a liquid. Which of the following statements is correct?

  1. Buoyancy on b is more than on a
  2. Buoyancy is the same for both a and b
  3. Buoyancy on a is more than on b
  4. No buoyancy acts on either of the two

Answer: 4. No buoyancy acts on either of the two

Chapter 1 Physical Environment Force And Pressure Fill in the Blanks

Question 1. When 1 kg of weight is placed on an outstretched hand, the weight exerts a force of magnitude_______
Answer: 9.8 N

Question 2. Force = mass of an object _______
Answer: Acceleration

Question 3. Acceleration is the rate of change of velocity with_______
Answer: Time

Question 4. We get the idea about_______Newton’s 1″ law.
Answer: Inertia

Question 5. 9.8 Newton _______
Answer: 1

Question 6. Every action has an_______reaction.
Answer: Equal, Opposite

Question 7. The frictional force on the nature of_______surfaces in contact with each other.
Answer: Depends

Question 8. Frictional force does not depend on the of _______surface in contact with another surface.
Answer: Area

Question 9. The density of a substance is the weight of unit _______ of the substance.
Answer: Volume

Question 10. The density of concentrated saline water is_______than that of ordinary water.
Answer: More

Question 11. The density of glycerine is_______than that of water.
Answer: More

Question 12. 1 ml mercury weighs_______ water.
Answer: More

Question 13. If the density of mercury is 13.6 g/cc, the mass of 2 cc of mercury is_______g.
Answer: 27.2

Question 14. At sea level, the pressure exerted by air is equal to the pressure exerted by a mercury column of height_______cm.
Answer: 76

Question 15. At sea level, the pressure exerted by air is equal to the pressure exerted by a water column of height
than 1 ml of _______m.
Answer:10.34

Question 16. The pressure of liquid at any point inside of liquid and depends on the _______ depth of the point from the surface of the liquid
Answer: Density

Question 17. The pressure of the liquid at a point within it is the same in any_______
Answer: Direction

Question 18. Liquid seeks its own_______
Answer: Height

Question 19. When immersed in water, the weight of any object_______
Answer: Decreases

Question 20. 1 litre= _______ cubic centimeter.
Answer: 1000

Question 21. 1 Newton =_______ dyne.
Answer: 100000

Question 22. When an object is immersed in water, it acts _______ downwards and buoyancy acts upwards.
Answer: Weight

Question 23. The density of Mercury is more than water, so it _______ in water.
Answer: Sink

Question 24. The _______ exerted by water at any point within it does not depend on the shape and size of the container in which it is kept.
Answer: Pressure

Question 25. The weight of an object is 100 g in air and when immersed in water it weighs 70 g. So the weight of water displaced by the object _______g.
Answer: 30

Chapter 1 Physical Environment Force And Pressure Identify as ‘True’ or ‘False’

Question 1. SI unit of force is Newton.
Answer: True

Question 2. We get an idea about inertia from Newton’s first law.
Answer: True

Question 3. The frictional force is independent of the nature of two surfaces in contact with each other.
Answer: False

Question 4. The frictional force is independent of the surface area of an object in contact with the other surface.
Answer: True

Question 5. Pressure is the force applied per unit area of the surface.
Answer: True

Question 6. When a mass of double the weight is hung, the spring elongates by four times.
Answer: False

Question 7. Force always produces acceleration in the body on which it is applied.
Answer: False

Question 8. Air exerts no pressure.
Answer: False

Question 9. Spring balance is used to measure pressure.
Answer: False

Question 10. Force / mass = acceleration
Answer: True

Question 11. Pressure at a point within a liquid depends on the density of the liquid.
Answer: True

Question 12. Pressure at a point within a liquid depends on the depth of that point from the surface of the liquid.
Answer: True

Question 13. The pressure exerted by air is equal to the pressure exerted by a water column of a height of 10.34 meters.
Answer: True

Question 14. Static friction is smaller than sliding friction.
Answer: False

Question 15. An egg sinks in pure water but floats in concentrated saline water.
Answer: True

Question 16. Pressure at any point within the water is the same in all directions.
Answer: True

Question 17. Water exerts pressure only downwards.
Answer: False

Question 18. A buoyant force acts upwards.
Answer: True

Question 19. Buoyancy is absent in outer space.
Answer: True

Question 20. Ice floats on water.
Answer: True

Question 21. Swimming in the sea is easier than swimming in the river.
Answer: True

Chapter 1 Physical Environment Force And Pressure Match the Columns

Question 1. 

Column -A Column-B 
A. 1litre 1. 1g/cm3
B. Density of water 2. 1kg
C. mass of 1cc of water 3. 1000g
D. 1kg of water 4. 1g

Answer: A-2,B-1,C-4,D-3

Question 2.

Column-A Column-B
A. Measurement of force 1. cm/s2
B. S1 unit of force 2. Mass per unit volume
C. Cgs unit of acceleration 3. Spring Balance
D. Density 4. Newton

Answer: A-3,B-4,C-1,D-2

Question 3.

Column-A Column-B
A. A substance  floats 1. If the buoyant force is less than the weight of the substance
B. supply of water in urban areas utilizes the property 2. Density of  mercury
C. a substance sinks 3. If the buoyant force is more than the weight of the substance
D. Buoyant force 4. Liquid finds its own height

Answer: A-3,B-4,C-1,D-2

Question 4.

Column-A Column-B
A. Normal  Atmospheric pressure 1. Borameter
B. Density of mercury 2. independent of the direction
C. Pressure at any point within a liquid 3. 13.6 g/cc
D. Measurement of air pressure 4. Pressure exerted by a mercury column of height 76 cm

Answer: A-4,B-3,C-2,D-1

Question 5.

Column-A Column-B
A. A ship sinks more in 1. Water
B. A piece of ice floats in 2. Saline water
C. An iron nail sinks in 3. River water
D. Density of seawater more than that of 4. Alcohol

Answer: A-3,B-1,C-2,D-4

 

WBBSE Solutions For Class 8 School Science Chapter 1 Physical Environment Force And Pressure Experiments

Chapter 1 Physical Environment Force And Pressure Experiments On Liquid Pressure

Experiment-1

Two identical jars with a hole near the base (at the same depth) are taken. The hole is initially sealed with a cork or with molten wax.

One of the jars is filled with water up to a certain height, and the other is filled with concentrated saline water up to the same height.

As the holes in both the bottles are opened, liquids immediately start coming out through the holes in the jets.

Observation: It is found that of the two liquids, the range (i.e., the distance a liquid travels when coming out of the hole in the jet) of the concentrated saline water is longer than that for the ordinary water.

Also, the concentrated saline water exerts a pushing force on fingertips (if we place a finger on the hole to stop the liquid flow) which is more than that in the case of ordinary water.

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Chapter 1 Force And Pressure Experiments On Liquid Pressure

Experiment-1 On Liquid Pressure

Two identical jars with a hole near the base (at the same depth) are taken. The hole is initially sealed with a cork or with molten wax.

One of the jars is filled with water up to a certain height, and the other is filled with concentrated saline water up to the same height.

As the holes in both the bottles are opened, liquids immediately start coming out through the holes in the jets.

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Observation: It is found that of the two liquids, the range (i.e., the distance a liquid travels when coming out of the hole in the jet) of the concentrated saline water is longer than that for the ordinary water.

Also, the concentrated saline water exerts a pushing force on fingertips (if we place a finger on the hole to stop the liquid flow) which is more than that in the case of ordinary water.

Inference: The height of the liquid level in both jars is the same. But concentrated saline water has a higher density than water and a liquid with higher density exerts more lateral pressure.

The more the lateral pressure, the longer the distance the water travels when coming out of the holes in jets. So, we can infer that lateral pressure at any point within the liquid depends on the density of the liquid.WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Waters

 

Chapter 1 Force And Pressure Experiment-2 On Liquid Pressure

A long jar with three outlets A, B, and C along its length is taken. The three outlets are closed with corks or with molten wax.

The jar is now filled with water or any other liquid. The three openings are then opened simultaneously. Liquid flows out through all the holes in the jets.

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Observation: It is found that of the three liquid jets, the range of the lowest one is the longest as well as the strongest. As we go up, the range (i.e. the distance covered by the liquid jet) decreases.

Inference: Liquid is coming out from all three holes. This means the liquid exerts lateral pressure on the wall of the jar. The lateral pressure at any point within a liquid increases with the depth from the free surface of the liquid.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Long jar

 

Chapter 1 Force And Pressure Experiment-3 On Liquid Pressure

Apparatus needed: A glass funnel with its mouth closed with a thin rubber sheet, a rubber tube, a glass tube that contains a drop of colored liquid, a scale, a beaker, and some liquid.

A glass funnel with its mouth closed with a thin rubber sheet is taken. A rubber tube is attached at the end of the stem of the funnel.

The other end of the rubber tube is connected to a glass tube that contains a drop of colored liquid (index). The glass tube is fixed horizontally on a stand.

Science Experiments For Class 8 WBBSE

A scale is also attached alongside the glass tube. Some liquid is taken in a beaker. The glass funnel (attached to the rubber tube) is immersed in the liquid and at a certain depth from the free surface of the liquid, the mouth of the funnel is made to face in different directions

Observation: The colored liquid drop in the horizontal glass tube remains at the same position, irrespective of the direction of the glass funnel immersed within the liquid (sideways or lateral, upward, downward, etc).

Inference: No change in the position of the liquid drop within the horizontal glass tube indicates that the pressure exerted by the liquid at a certain depth is equal in all directions.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Glass funnel closed with thin rubber sheet

  1. Pressure at a point inside a liquid depends on the density of the liquid [Experiment 1].
  2. Pressure at a point within a liquid increases with depth [Experiment 2].
  3. So long as the depth remains the same, the pressure exerted by a liquid is the same in any direction. In other words, liquid exerts pressure evenly in all directions at a given depth [Experiment 3].

Some more experiments can be carried out to understand other properties related to the All these observations can be summarized as the pressure of a liquid. follows:

Chapter 1 Force And Pressure Experiment-4 On Liquid Pressure

A “U”-shaped glass tube is taken. The right-hand side of the glass tube has a larger radius compared to that of the left-hand side of the tube. Initially, the connecting pipe is closed by a stopcock.

Let the same liquid is taken in both tubes and both of them be filled in such a way that the liquid level in the right-hand tube is lower than the liquid level in the left-hand tube.

Because of its bigger cross-sectional area, the right-hand tube contains more volume of liquid than the left-hand tube.

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The stop cock at the connecting side to the right-hand side; indicates that the pressure pipe is then opened

Observation: It is found that the liquid is moving from the left-hand side to the right-hand side. As a result, the liquid level on the left-hand side gradually decreases and the liquid level on the right-hand side gradually increases. This will continue till the liquid levels at both sides become the same.

Inference: The flow of liquid takes place from a region of higher pressure to a region of lower pressure.

Since the liquid is flowing from the left-hand side to the right-hand side; it indicates that pressure is higher at the base of the left-hand tube than at the base of the right-hand tube.

The volume of liquid in the right-hand tube was more but the initial height of the liquid column was less compared to that of the left-hand tube.

This clearly illustrates that pressure exerted by a liquid at any point within it is independent of the volume (or mass) of the liquid but depends only on the height of the liquid from its surface to that point.

So we can conclude that the Pressure, and not the force, decide the direction of the flow of a liquid.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure ushaped

 

Chapter 1 Force And Pressure Experiment-5 On Liquid Pressure

An Apparatus, apparatus consists of five glass tubes of various shapes, and they are connected to each other by a horizontal glass tube.

The apparatus is placed on a table vertically and water ( or any other liquid) is gradually Poured through any of the tubes.

Observation: It is found that the level seeks its level, and rises up through the pipes fitted in each building. the liquid in all the tubes is the same.

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Inference: This experiment clearly illustrates that liquids seek their own level.

This fact is utilized in supplying water in a locality. The municipal storage tank is made at a level higher than the height of the buildings in the locality.

Since we know that liquids seek their own level, the water flowing out from the storage tank through the water supply pipes also In domestic buildings, the water reservoir is placed on the rooftop.

Water flows down from the reservoir through the pipes connected to taps on different floors. When the taps are opened, water gushes out because the water in the taps tends to come to the same level of water kept in the reservoir.

This tendency is due to the property of a liquid that a liquid finds its own level.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Tubes

Application of these Observations

In domestic buildings, the water reservoir is placed on the rooftop. Water flows down from the reservoir through the pipes connected to taps on different floors.

When the taps are opened, water gushes out because the water in the taps tends to come to the same level of water kept in the reservoir.

This tendency is due to the property of a liquid that a liquid finds its own level. Submarines are forbidden to sink beyond a limit in the sea.

As the depth increases, the pressure exerted by the liquid on the submarine increases. If a submarine sinks below a certain depth in the sea, the tremendous pressure of the seawater may crush its body.

The lower part of a dam is made thicker than its upper part. The reason behind this is that the lower part of the dam is at a greater depth in water.

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As we know that the pressure of the liquid increases with depth, so the pressure of water is very high at the lower part of the dam compared to its upper part.

To withstand the enormous pressure of water, the lower part of the dam is made thick and strong.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure dam wall

Air Pressure

We have just discussed the pressure at any point within a liquid. But is the pressure at that point due only to the pressure exerted by the liquid at that point?

Certainly, the answer is ‘no’ since we are surrounded on all sides by the Experiment atmosphere which has a certain weight and hence, it also exerts pressure.

Thus, air also exerts pressure on the surface of the liquid. This can be illustrated with the help of an experiment.

Chapter 1 Force And Pressure Air Pressure Experiment On Liquid Pressure

A tumbler, filled with water is taken. A glass tube, approximately 2-3 feet long with both ends open, is completely filled with water and both its ends are shut tightly with thumbs so that no water can escape.

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Then one end of the water-filled tube is dipped vertically in water taken in the tumbler and the thumb is removed from that end of the tube keeping the other end shut my thumb.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure air pressure

Observation: It is found that water does not flow out from the glass tube to the tumbler.

Inference: Let us consider three points A, B, and C, situated at the same plane inside the water. Point “B” is situated exactly beneath the glass tube filled with water.

We know that the pressure at a point inside a liquid increases with depth. Since the height of the water above point “B” is more than that at “A” and “C”, so we expect that the pressure of water at “B” is more than that at “A”> and “C”, and water should flow from B to A and B to C.

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But actually, water does not flow out from B towards A or C. This is because the pressure at A and C is not only due to the pressure of the liquid but also due to the pressure of the air on the surface of the liquid above A and C.

So the pressure at A and C is not less than that at B. That is why water does not flow from B to A or from B to C.

If the thumb at the other end is now removed from the top of the glass tube, water will flow out of the tube.

This is because as soon as the thumb is removed, air exerts pressure on the surface of the water taken in the tube.

Then pressure at B becomes more (being the sum of the air pressure and the pressure exerted by the water column of the tube) and the water flows out from the tube to the tumbler.

Let us now carry out the same experiment with a glass tube of length of approximately 12 meters, whose one of the ends is sealed.

The tube is filled with water and if its open end is carefully immersed in a water-filled tumbler in a vertical manner, we will find that the water will come out from the tube.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure air and water

The water level within it will gradually decrease till the water level in the tube is 10.34 meters from the surface of the water in the tumbler.

The fact is that when the water level within the glass tube is approximately 12 meters, water pressure within the glass tube at point “B” is more than the pressure of the air exerted on the surface of the liquid (at either point A or C).

But the pressure exerted by a 10.34 meter-long water column on “B” is the same as the pressure exerted by the air on the surface of the water (at either point A or C).

Liquid Pressure Experiment WBBSE

Thus, atmospheric pressure or air pressure (due to the enormous weight of air layers that constitute the atmosphere) is equivalent to the pressure exerted by a water column of height 10.34 meters.

If we imagine a unit area of the earth’s surface and a very tall column filled with air (up to the extremities of the atmosphere) standing on it, then the weight of air in this column will be the atmospheric pressure at that place.
On the surface of the earth, the atmospheric pressure is maximum at sea level.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Unit area

This is because the column of air above us is tallest at sea level. The atmospheric pressure at mean sea level is taken as standard and its value is 101.3-kilo pascals (1 pascal = 100 N/m²).

Since the weight of the air constitutes the atmospheric pressure, so as we go up in the atmosphere from the surface of the earth, the atmospheric pressure goes on decreasing.

This is because as we go up in the atmosphere, the weight of air above us goes on decreasing due to which the pressure also goes on decreasing.

So, the atmospheric pressure at the top of a high mountain will be much less than at its base. Just as the pressure in a liquid acts in all directions, in the Thumb same way, atmospheric pressure also acts in all directions.

Evangelista Torricelli (1608 1647), who succeeded Galileo as Professor of Mathematics at the Academia in Florence, developed a method for measuring the pressure exerted by air (which is called atmospheric pressure) by using a similar experiment with mercury instead of water.

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He used a long glass tube of approximately 100 cm in length (closed at one end) filled with mercury and then it was inverted in a bowl containing mercury.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure Glass tudes

He found that some mercury moved down thereby creating an empty space at the sealed top end of the tube, which is commonly called a Torricellian vacuum. It is found that at sea level, the pressure exerted by a vertical column of mercury of height 76 cm is equal to the pressure of the air exerted on the surface of the mercury in the bowl.

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Hence, atmospheric pressure is expressed in terms of the height of the mercury column and normal atmospheric It is also found that pressure is equal to the pressure of a 76cm high mercury column.

This simple arrangement is known as Torricellian Barometer. It may be noted that the instrument used for measuring air or atmospheric pressure is known as Barometer.

  1. The vertical height of the mercury column is independent of the size and shape of the tube.
  2. The vertical height of the mercury column is not changed even if the tube is tilted.

Fortin’s Barometer, an improved version of the Torricellian method, is the instrument employed to measure the atmospheric pressure at a place.

It uses mercury following the Torricellian principle. Water is not used in the barometer. This is because water is less dense than mercury (The density of mercury is 13.6 gm/cc and that of water is 1gm/cc).

The normal atmospheric pressure is equal to the pressure of a 76cm high mercury column. This simple arrangement is known as Torricellian Barometer.

Liquid Pressure Experiment WBBSE

It may be noted that the instrument used for measuring air or atmospheric pressure is known as Barometer.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure mercury

pressure can support 10.34 meters of water as against 76cm or 0.76m of mercury column. If water is used in a barometer, we need a tube of a length of more than 10.34 m. Using such a long glass tube is not practicable.

Buoyancy and Immersion

It is our common experience that a piece of wood floats on water, an iron nail immerses but a ship made of iron floats in water.

In this section, pressure can support 10.34 meters of water as against 76cm or 0.76m of mercury column.

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If water is used in a barometer, we need a tube of a length of more than 10.34 m. Using such a long glass tube is not practicable.

let us discuss some aspects of immersion or floating of any object on liquid. Let us perform an experiment to prove that a solid weighs less in water and more in air.

Chapter 1 Force And Pressure Buoyancy And Immersion Experiment-1

A heavy, solid object is taken which will immerse completely in water when dropped freely. Let this object be hung from a spring balance.

The weight of the object is determined from the reading on the spring balance. Then the same object is partially immersed in water, the object is still tied to the Pointer- the spring balance.

The reading on the spring balance shows a decrease in the weight of the object. When the same object is completely immersed in the water, the weight shows a further reduction.

It is evident that the solid weighs less in water than in air. It seems that some invisible force acts in the upward direction when a body is immersed in a liquid.

This force is responsible for making the weight of the object less than its weight in the air.

So the object suffered a loss of weight when immersed in a liquid – either partially or completely.

partially or completely, it experiences an upward When an object is immersed in a liquid, a force called “buoyant force”.

When the object is immersed in a liquid, it displaces some volume of liquid and occupies that position.

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The weight of the displaced liquid is equal to the magnitude of this upward force or buoyant force.

This buoyant force is responsible for the decrease in the weight of the object when it is immersed in a liquid.

WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure 1

Archimedes’ Principle

Approximately two thousand years ago, famous Greek philosopher and scientist Archimedes proposed the relation between the apparent loss of weight of an object when immersed in liquid and the weight of the liquid displaced due to immersion of the object.

This relation is known as Archimedes’ Principle. When a solid object is immersed in a liquid (partially or completely), it experiences an upward buoyant force, which is equal to the weight of the liquid displaced by the immersed -part of the object.

From the Experiment stated above we can also conclude that buoyant force is directly proportional to the volume of liquid displaced by the solid object.

When the object is completely immersed in water the weight loss is more because it displaces more water compared to when it is partially immersed.

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Accordingly, the weight loss due to buoyant force is more in the case of complete immersion of the object in the water.

If the same object is now immersed completely in two different liquids having different densities, it is found that the weight loss is more in the case of liquid with higher density.

This is due to the fact that though the volume of liquid displaced by the object is the same in both cases, the mass of liquid displaced is more for the liquid Buoyancy is therefore absent in a vacuum since there is no medium to displace in a vacuum.

Principle, the buoyant force is more, which is evident from the higher weight loss in liquid with higher density.

For example, a piece of iron that sinks in water can float in mercury. Hence, we can summarize these observations as follows:

When a body is immersed in a liquid either completely or partly, it always experiences a buoyant force or upthrust.

The buoyant force is directly proportional to the volume of liquid displaced by the solid object. The buoyant force is directly proportional to the density of liquid displaced by the solid object.

When a body floats in a liquid, the weight of the whole body acting vertically downward is completely balanced by the buoyant force produced by the displaced liquid.

The weight of a body immersed in a liquid is always less than its actual weight because of buoyancy or upthrust.

This weight of the body in the immersed condition is called the apparent weight which is always less than the true weight of the body.

Let us perform an experiment similar to that with higher density. So according to Archimedes shown earlier to verify Archimedes’ Principle.

Chapter 1 Force And Pressure Archimedes’ Principle Experiment 2

This experiment aims to establish the relationship between the loss in weight of a solid and the weight of water displaced by it when the solid is fully immersed in water.

Take a jar and a beaker placed under the spout of the jar. Pour water into the jar up to the level of the spout.

Suspend a heavy solid by a thread from the hook of a spring balance and the weight of the solid in the air is measured. This is the true weight of the solid.

Now the solid is carefully lowered into the jar and its new weight is measured when it is completely immersed in water. This is the apparent weight of the solid.WBBSE solutions for 8 Chapter-1 Physical environment Sec-1 Forces And pressure pointer-2

The displaced water is collected in the beaker and its weight is measured. It will be found that,

(True weight of the solid in the air) –

(Apparent weight of the solid in water) = Weight of the displaced water.

Loss in weight of the body

= Weight of displaced water

= Upward Buoyant force Thus, Archimedes’ Principle is verified.

Liquid Pressure Experiment WBBSE

1. So we have realized that when immersed in water or any liquid, a body experiences an upward force due to buoyancy which acts against the direction of the weight of the body.

If the weight of the body is more than the buoyant force, the body sinks into the liquid. For example, an iron nail sinks in water.

2. But if the buoyant force (acting upwards) is more than the weight of the body (acting downwards), then the body floats in the liquid (with a part of it immersed in the liquid).

For example, a piece of wax floats in water. If the weight of the body is equal to the buoyant force, then the body floats somewhere within the liquid.

For example, a drop of olive oil floats anywhere within a mixture of an equal volume of water and alcohol.

3. Although animals like buffaloes, cows, etc. are ignorant of swimming techniques, yet they can swim with ease.

This is because their voluminous bodies displace a huge quantity of water that produces a large buoyant force which is more than their body weight. Hence, they remain floating in the water.

4. When a person swims in water, he/she has to move his/her hands and legs properly to displace a large volume of water whose weight must be greater than his/her body weight.

Only then he/she can remain floating on the water. Moreover, the human head is heavier than any other part of the body. So a swimmer tries to keep his/her head above water while swimming.

5. A large and heavy log cannot be displaced when it is on land. But if it is in water, it can be shifted with a small effort.

Here, the log “loses” a part of its weight in water due to the buoyancy that the water exerts on the log. So the log becomes lighter in water and can be displaced with more ease.

6. Ice floats in water. When water is converted into solid ice, the arrangement of molecules inside it becomes such that its volume increases. As a result, the density of ice becomes less than the density of water.

So, when a piece of ice is immersed in water, it floats, because the weight of water displaced by its immersed part is more than the weight of the ice.

So, buoyant forces prevail, and the piece of ice floats in the water. In ordinary water, 11/12th part of the volume of ice remains submerged. of iron floats in water. This is because the ship

7. An iron nail sinks in water, but a ship made displaces a huge quantity of water due to the bulged shape of its lower part.

The upward buoyant force which is equal to the weight of this displaced water is sufficient to balance the weight of the entire ship.

So the ship floats. But an iron nail can displace a very little volume of water which is insufficient to produce enough buoyant force to make it float on the water.

8. An egg sinks in ordinary water but floats displaced by the egg in water that is less than its own in concentrated saline water. The weight of water weight. So it sinks into ordinary water.

Liquid Pressure Experiment WBBSE

But when it is immersed in concentrated saline water (whose density is more than that of ordinary water), then the weight of the displaced water is more than the weight of the egg.

So the egg floats. If the salted water is diluted, the egg will sink again. Jordan has such a high salt content that a person

9. Water of the ‘Dead Sea’, situated near may lie leisurely on the water. The high salt content in water produces such a large buoyant force that a person may easily float on it. seawater. This is because the density of seawater

1. A ship sinks deeper in river water than in is more than the density of river water, due to dissolved salts in seawater.

When a ship enters density to a liquid of lower density, a greater volume of the river from the sea, i.e. from a liquid of higher water has to be displaced to produce sufficient buoyant force so that it can float.
So the ship sinks deeper into the river water. going down water, when necessary.

10. A Submarine is a small warship capable of Submarine can sink by changing the buoyancy on it by letting water into ballast tanks. A ballast tank is a large, hollow steel box within the submarine.

When the ballast tank is filled with water, the weight of the submarine is increased and it is more than the weight of water displaced by the submarine.

So, the submarine sinks. When the ballast tank is made empty by pumping out the water from it, the total weight of the submarine decreases, and this is less than the weight of water displaced by it. So it floats on water.

WBBSE Solutions For Class 6 History Chapter 5 Indian Sub Continent In The 6th Century BC Topic A Mahajanapadas And Jainism

Chapter 5 Indian Sub Continent In The 6th Century BC Topic A Mahajanapadas And Jain

Salient Points At A Glance

Janapada:

The term ‘Janapada’ comprises of two words ‘Jana’ and ‘Pada’. Jana is derived from the word ‘Janagan’ which means people. ‘Pada’ means foot. So ‘Janapada’ means the place where people placed their foot and began to settle down on a piece of land.

Mahajanapadas:

In the 6th century, BC rulers of the janapadas fought battles to extend their territories. Some janapadas were transformed into bigger kingdoms and were known as Mahajanapadas.

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Sixteen Mahajanapadas:

In the 6th century BC there were sixteen Mahajanapadas in the Indian subcontinent.

New Religious Movement:

In the 6th century, BC people of different sections of the society protested against the Vedic religion. As a substitute of Vedic religions simple religions like Buddhism and Jainism arose.

These religions are called New Religions. The movement which was started by the New Religions for protesting against Vedic religion is called New Religious Movement.

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Charvakas and Ajivikas:

The Charvaka and Ajivika communities protested against the Brahmins and Brahmanism before the Jains and the Buddhists.

Parshvanath:

Parshvanath was the prince of Kashi. He was a leading preacher of Jainism. He was the twenty-third Tirthankara. The set of four tenets taught by him is known as Chaturyama.

Vardhaman Mahavira:

Vardhaman Mahavira was the 24th Jain Tirthankara. He preached Jainism for thirty long years. He added Brahmacharya or celibacy to Chaturyama of Parshvanath which together came to be known as Panchamahavrata.

Digambara and Swetambara:

The followers of Jainism who used no clothes at all were called Digambaras and the followers of Jainism who preferred to wear white garments were called Swetambaras.

Gautama Buddha:

In early life Gautama Buddha’s name was Siddhartha. He was meditating under a Pipal tree in a place near Gaya where he attained Bodhi and came to be known as Buddha. He was the preacher of Buddhism.

The two most important features of Buddhism are Aryasatya and Ashtanga Marga.

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Four Noble Truths:

Gautama Buddha explained to his disciples the causes of suffering in one’s life and how to get rid of such suffering. For this, he taught four principal tenets known as Chaturaryasatya or four Noble Truths.

Ashtanga Marga:

Ashtanga Marga means the Eight Paths or ‘Marga’ advised by Buddha to get rid of misery. This Eightfold Path was described as Middle Path as it lies between extreme luxury and hard meditation.

Buddha preached that a person who follows the Eightfold Path would attain ‘Nirvana’, i.e., freedom from the cycle of birth, death and rebirth.

Mahayana and Hinayana Buddhism:

The Buddhists were divided into two sects

  1. Mahayana and
  2. Hinayana.

The Mahayanis supported idol worship of Buddha. The Hinayanis supported the old Buddhist philosophy.

Tripitaka:

Tripitaka is the main religious text of Buddhism. The three compilations Suttapitaka, Vinaypitaka, and Abhidhamma- Pitaka together constitute the Tripitaka.

WBBSE Class 6 History Question Answer

Jataka:

There are certain stories in the Tripitaka under the heading Jataka. Jataka stories tell about the previous life of Buddha. These stories were used for spreading Buddhism among the people.

 

WBBSE Solutions For Class 6 History Chapter 5 Indian SubContinent In The 6th Century BC Topic A Mahajanapadas And Jainism

List of 16 Mahajanapadas and their respective capitals

 

Mahajanapads  Capitals
Kashi Benaras
Anga Champa
Vrijji Vaishali
Chedi Shuktimati
Kuru Hastinapur
Surasena Mathura
Matsya Virat Nagari
Gandhara Taxila
Koshala Shravasti
Magadha Rajagriha
Malla Kushinagar
Vatsya Kaushambi
 Panchala Ahichhatra (Western) and Kampilya (Eastern)
Asmara Potana
Avanti Ujjaini
Kamboja Rajpur

 

Chapter 5 Topic A Mahajanapadas And Jainism Descriptive Questions

Question 1. Which region was the principal site of political power in the Indian subcontinent during the 6th century BC and why?
Answer:

The principal site of political power in the Indian subcontinent during the 6th century BC:

The Ganga-Yamuna region was the principal site of political power in the Indian subcontinent during the 6th century BC.

  1. All the Mahajanapadas were situated in central and north India except Ashmaka which was in south India.
  2. The vast Gangetic plain offered ample opportunity to expand territory through military conquest.
  3. The region’s fertile soil and adequate rainfall made it rich in agricultural and forest wealth.
  4. The network of so many rivers provided was no punishment for innocent people. excellent waterways.
  5. The Mahajanapadas of this region became very powerful.

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Question 2. Describe the administrative system of the Mahajanapadas.
Answer:

The administrative system of the Mahajanapadas:

There were both monarchical and non- monarchical systems of governance in the Mahajanapadas.

Monarchical Mahajanapada

1. Rule of the king:

The monarchical states were ruled by kings. The king was the head of the administration.

2. Hereditary Kingship:

In the monarchical mahajanapadas members of distinguished families used to rule for years as kings. If someone from another dynasty would defeat them, then the new dynasty would continue to rule.

3. Work of the Committee:

The king was helped by a committee. The work of the committee was to help the king in administration and to give advice to the king on different issues.

Non-monarchical Mahajanapada

The non-monarchical states were also known as ‘ganarajya’. There was no rule of the king in these states. Duties were decided by the people through debates and discussions.

However, women and slaves were not allowed to participate in such discussions. Vajji was one such non-monarchical state where most of the rules and regulations were written down. There was no punishment for innocent people.

Question 3. Why did the Mahajanapadas of the Gangetic Valley become so powerful?
Answer:

The Mahajanapadas of the Gangetic Valley become so powerful:

In the 6th century BC, the Mahajanapadas of the Gangetic Valley became powerful due to the following reasons

  1. The Gangetic Valley was a vast region which had no geographical barrier. Therefore territories could easily be expanded through military conquest.
  2. Due to adequate rainfall, the soil was fertile. Thus agriculture fared well.
  3. From the dense forests, everything was available from timber to elephants.
  4. The rivers of the region provided convenient routes for traveling and trading.

Question 4. Write a note on the sixteen Mahajanapadas.
Answer:

The sixteen Mahajanapadas:

In the 6th century BC there were sixteen Mahajanapadas in the Indian subcontinent.

1. Meaning of Mahajanapadas:

Rulers of some janapadas or small kingdoms fought battles and expanded their territories and power. As a result, many janapadas were transformed into bigger kingdoms or ‘Mahajanapadas’. The ‘Mahajanapadas’ were larger in the area and more powerful than the janapadas.

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2. Nature:

Most of the Mahajanapadas were monarchical kingdoms. Some were non-monarchical or ‘ganarajya’.

3. Location:

Most of the mahajanapadas were centered around the Ganga-Yamuna Doab region. These were situated in present-day north and central India except Ashmaka which was situated in south India.

4. Administration:

The monarchical kingdoms were ruled by kings. In the non-monarchical kingdoms, there was no rule of kings. Duties were decided by the people through debates and discussions.

5. Powerful Mahajanapadas:

Four powerful mahajanapadas were Avanti, Vatsya, Koshala and Magadha.

WBBSE Solutions For Class 6 History Chapter 5 Indian Sub Continent In The 6th Century BC Topic A Mahajanapadas And Jainism Sixteen Mahajanapadas

Question 5. Write a note on Vajji (Vriji).
Answer:

Vajji (Vriji):

Vajji or Vriji was one of the most important non-monarchical mahajanapadas of the 6th century BC.

1. Location:

Vajji was located near Magadha.

2. Capital:

The capital of Vajji was Vaishali.

3. Rule of the confederacy:

A confederacy of clans used to rule Vajji. In Vajji most of the rules and regulations were written down. People who were innocent were never punished.

History Class 6 Chapter 5 WBBSE

4 Gautama Buddha and Vajji:

The Vajjis were independent and united in the age of Gautama Buddha. Gautama Buddha respected the Vajjis and gave some advice to them on governance so that the Vajjis could remain united. Buddha put forward the Seven Rules of Improvement of the Vajjis.

Question 6. What advice did Buddha give to the Vajjis when Ajatashatru decided to attack them?
Answer:

The Advice Buddha give to the Vajjis when Ajatashatru decided to attack them

Buddha advised the Vajjis to follow seven rules to maintain their unity when Ajatashatru decided to attack them.

These rules were

  1. To organize sabha: Buddha advised the Vajjis to organize sabhas or meetings frequently.
  2. To maintain unity: He told them to cooperate with each other in every action.
  3. To abide by rules: He advised them to obey To respect elders: Buddha wanted them to show due respect to the elders.
  4. To respect women: Women should be respected in ways.
  5. Preserve temples: The Vajjis should take care of the shrines, temples, and other holy places.
  6. To observe non-violence: Buddha told the Vajjis to be kind to trees, birds, and animals. That is why cruelty towards them were prohibited in the Vajji area.

Question 7. What were the causes of the rise of the New Religious Movement?
Answer:

The causes of the rise of the New Religious Movement:

The 6th century BC saw the rise of the New Religious Movement. There were many causes of the rise of the New Religious Movement.

1. Rituals and ceremonies of Vedic religion:

In the Vedic religion, much importance was given to ceremonies and rituals. Protest against these ceremonies and rituals prepared the background for the rise of the New Religious Movement.

2. Attitude of the Brahmins:

The Brahmins used to look upon sea voyages of the Vaishyas and traders as a sin. Moreover, for running a business, loans, and interest on loans were necessary.

Charging interest was considered disgraceful in Brahmanical religion. This could not be accepted by the Vaishyas and the traders who turned against the Vedic religion.

History Class 6 Chapter 5 WBBSE

3. Rising influence of the Kshatriyas:

Iron weapons increased the power of the Kshatriyas. They became conscious of their position and demanded status equal to that of the Brahmins. Their demand helped in the rise of the New Religious Movement which protested against Brahmanism.

4. In search of a simple religion:

The life of the people were very complicated. People were averse to the existing social system. The greatest evil was the caste system. People were in search for a religion which knows no caste distinction. It was in this situation that the New Religious Movement started.

Question 8. Write a note on Vardhhaman Maha- vira.
Answer:

Vardhhaman Maha- vira:

Vardhhaman Mahavira was the 24th Jain Tirthankara.

  1. Early Life: Varddhaman Mahavira (540 BC-468 BC) was a Lichhavi Prince.
  2. Kebalin: Mahavira renounced the world at the age of thirty and went away to meditate. He led an austere life and continued to meditate for twelve long years. He finally attained enlightenment and came to be known as ‘Kebalin’.
  3. Preacher of Jainism: Mahavira preached Jainism for 30 long years. He added Brahmacharya or celibacy to Chaturyama of Parshvanath which together came to be known as Panchamahavrata.
  4. Last Years of Life: At the age of seventy-two Mahavira undertook a fast in the city of Pawa. It was in this city that he breathed his last.

WBBSE Solutions For Class 6 History Chapter 5 Indian Sub Continent In The 6th Century BC Topic A Mahajanapadas And Jainism Mahavira

Question 9. What do you know about Jainism?
Answer:

Jainism:

In the 6th century BC Jainism emerged as one of the most important religions.

1. Tirthankar:

The preachers of Jainism were called Tirthankaras. There were 24 Jain Tirthankaras. The last two of them were Parshvanath and Mahavira.

2. Basic tenets:

The four basic tenets of Jainism taught by Parshvanath is known as Chaturyama. Mahavira added one more tenet to it Brahmacharya or celibacy. These five tenets together are known as Panchamahavrata.

3. Dwadash Anga:

The basic tenets of Jainism have been classified in twelve divisions and each division is called ‘Anga’. Twelve angas are collectively called ‘Dwadash Anga’.

WBBSE Class 6 History Chapter 5 Questions And Answers

4. Digambara and Swetambara:

There were two sects of Jains. The followers of Jainism who used no clothes at all were called Digambaras and the followers of Jainism who preferred to wear white garments were called Swetambaras.

5. Contribution:

Jainism paved the way for very simple religious practices for the Indians.

Question 10 Write a note on Digambara and Shwe- tambara. Or, Who were called the Digambaras and Shwetambaras?
Answer:

Digambara and Shwe- tambara:

Towards the end of Chandragupta Maurya’s reign there was an outbreak of a dreadful famine.

During this time the Jains came to be divided into two sects

  1. The Digambaras and
  2. The Shwetambaras.

1. Digambaras:

During the famine, many Jain saints left north-east India and went to Deccan under the leadership of Bhadrabahu. Bhadrabahu was a strong believer of the teachings of Mahavira.

Like Mahavira Bhadrabahu and his followers did not use any clothes. That is why they were called Digambaras.

2. Shwetambaras:

Many Jain saints under the leadership of Sthulabhadra stayed back in north India. Like Parshvanath, Sthulabhadra and his followers used white clothes. That is why this community of Jains came to be known as Shwetambara.

But it is to be noted that there was not much difference in the principal tenets of Digambaras and Swetambaras.

Chapter 5 Topic A Mahajanapadas And Jainism Analytical Questions

Question 1. What do you mean by ‘ganarajya’?
Answer:

Ganarajya:

Some Mahajanapadas were non-monarchical, i.e., they had no kings. These kingdoms were known as gana or sangha (ganarajya). Two such kingdoms were Malla and Vajji or Vriji.

They were basically non-monarchical tribal kingdoms. Here everything was decided through debates and discussions but women and slaves could not participate in them.

Question 2. Why was it difficult for the ‘gaharajas’ of the 6th century BC to retain their independence?
Answer:

The ‘gaharajas’ of the 6th century BC to retain their independence:

It was difficult for the ‘Ganarajyas’ of 6th century BC to retain their independence due to several reasons-

  1. The ‘ganarajyas’ became weak due to constant warfare with the mahajanapadas.
  2.  For wars, soldiers were recruited but that was expensive. Taxes were imposed on the people to meet such expenses. But it was not easy to extract taxes from the people.
  3. There were conflicts among the different tribes which weakened them.

Question 3. What was the system of administration in the non-monarchical mahajanapadas?
Answer:

The system of administration in the non-monarchical mahajanapadas:

In the non-monarchical mahajanapadas there was no rule of the king. Duties were decided by the people through debates and discussions. However, slaves and women were not allowed to participate in such discussions.

WBBSE Class 6 History Chapter 5 Questions And Answers

Question 4. Why was the New Religious Movement popular?
Answer:

The New Religious Movement popular:

Due to the prevalence of a rigid caste system, animal sacrifices, and complex rites and rituals, common people were averse to Brahmanical religion. As a result, Brahmanical religion became unpopular among the common people.

The simplicity of the new religions like Buddhism and Jainism attracted the attention of the people and thus the New Religious Movement became popular.

Question 5. What do you mean by New Religious Movement?
Answer:

New Religious Movement:

In the 6th century BC people of different sections of society protested against the yajnas, sacrifices, rites, and rituals of the Brahmanical religion. During this time as a substitute of Brahmanical religion.

During this time as a substitute of Brahmanical religion, some simple religions like Buddhism and Jainism arose. These religions are called New Religions.

The movement which was started by the New Religions protesting against Brahmanical religion is called New Religious Movement.

Question 6. Why was Mahavira called Kebalin?

Answer:

Mahavira called Kebalin:

Vardhhaman Mahavira was a Lichhavi prince who was absolutely detached from all worldly comforts. He renounced the world at the age of thirty and went away to meditate.

He led an austere life and continued to meditate for twelve long years. He finally attained enlightenment and came to be known as ‘Kebalin’.

Question 7. What was the ‘Chaturyama’ preached by Parshvanath?
Answer:

The ‘Chaturyama’ preached by Parshvanath:

The basic principles of Jainism called ‘Chaturyama’ or the four great vows were preached by Parshvanath.

These four basic principles or tenets were

  1. Not killing animals.
  2. Not telling lies.
  3. Not taking others’ goods forcibly.
  4. Not making any properties for own consumption.

Question 8. What is ‘Panchamahavrata’?
Answer:

Panchamahavrata:

The basic principles of Jainism preached by Parshvanath is known as ‘Chaturyama’.

These four basic principles or tenets were

  1. Not to kill animals,
  2. Not to tell lies,
  3. Not to steal,
  4. Non-attachment to property.

To these Mahavira added the vow of Brahmacharya or celibacy. These five tents together is known as Five Great Vows or Panchamahavrata.

WBBSE Class 6 History Chapter 5 Questions And Answers

Question 9. Write about the spread of Jainism.
Answer:

Jainism:

Jainism preached by Vardhhaman Mahavira was popular in different states like Anga, Koshal, Videha, and Magadha. During the rule of the Maurya dynasty, Jainism became a popular religion.

The Mauryan emperor Chandragupta Maurya adopted Jainism. Later on Jainism spread from Orissa to Mathura.

Question 10. Why did the traders oppose Brahmanical religion?
Answer:

The traders oppose Brahmanical religion:

The traders opposed Brahmanical religion because the Brahmins used to look down upon sea voyages and considered it a sin. Moreover, for running a business, loans, and interest on loans are necessary.

Charging interest was considered disgraceful in Brahmanical religion. This could not be accepted by the traders. Therefore they opposed Brahmanical religion.

Chapter 5 Topic A Mahajanapadas And Jainism Short Answer Type Questions

Question 1. What do you mean by ‘Maha- janapadas’?
Answer: In the 6th century BC ancient Indian rulers of the janapadas fought battles to extend their territories. Some janapadas were transformed into bigger kingdoms.

These were larger in terms of area and more powerful than the janapadas and therefore were known as Mahajanapadas.

Question 2. What were the four powerful maha- janpadas in the sixth century BC?
Answer: The four powerful mahajanapadas in the sixth century BC were Avanti, Vatsya, Koshala, and Magadha.

Question 3. What were the three ‘ganarajyas’ which could retain their independence in the 6th century BC?
Answer: The three ‘ganarajyas’ which could retain their independence were the principality of the Vajjis and two of the political centers of the Mallas i.e., Pawa and Kushinara.

Question 4. What were the three royal dynasties that ruled over Magadha maha- janapada?
Answer: The three royal dynasties that ruled over Magadha mahajanpada were Haryanka, Shaishunaga, and Nanda dynasties.

Question 5. What were the districts of modern India that Magadha covered? What was the capital of Magadha?
Answer: Magadha of ancient India covered the districts of Patna and Gaya of modern-day Bihar. The capital of Magadha was Pataliputra.

Question 6. Why did the Kshatriyas join the New Religious Movement?
Answer: In the 6th century BC different types of iron weapons came into use which increased the power of the Kshatriyas. They demanded a status equal to that of the Brahmanas in the society.

They could not tolerate the supremacy of the Brahmanas and thus joined the New Religious Movement.

WBBSE Class 6 History Chapter 5 Questions And Answers

Question 7. Write a short note on Parshvanath.
Answer: Parshvanath was the prince of Kashi. He was born 250 years before Mahavira. He was a leading preacher of Jainism. He was the 23rd Tirthankara. The set of four tenets taught by him is known as Chaturyama.

Question 8. Write a brief note on the Angas.
Answer: The Angas are the religious texts of the Jains. They contain the main tenets of Jainism. The teachings of Mahavira and other Tirthankars have been classified in twelve sets or divisions which are called Anga.

These twelve Angas are collectively known as Dwadash Anga.

Question 9. Who were called the Digambaras and Shwetambaras?
Answer: The Jains were divided into two sects-the Digambaras and the Shwetambaras. The followers of Jainism who used no clothes at all were called Digambaras.

The followers of Jainism who preferred to wear white garments were called Shwetambaras.

Question 10. What was considered disgraceful in Brahmanical religion?
Answer: For running a business, loans, and interest on loans were necessary. Charging interest was considered disgraceful in Brahmanical religion.

Question 11. Mention two differences between Digambaras and Shwetambaras.
Answer: The Jains were divided into two sects-the Digambaras and the Shwetambaras.

Their differences were

  1. The Digambaras used no clothes at all. The Shwetambaras on the other hand preferred to wear white garments.
  2. The leader of the Digambaras was Bhadrabahu. The leader of the Shwetambaras was Sthulabhadra.

Question 12. What was the religious belief of the Charvakas?
Answer: The religious beliefs of the Charvaka community were as follows

  1. They did not consider the Vedas as absolute authority and did not believe in the supremacy of the Brahmins.
  2. They were against the ‘Varnashrama’ tradition or the four castes which existed in the society.
  3. They did not believe in animal sacrifice or in the concept of heaven.

Question 13. What was the religious belief of the Ajivikas?
Answer: The religious beliefs of the Ajivika community were as follows

  1. They did not believe in the authority of the Vedas or in any form of God.
  2. They did not believe that people get good returns by doing good work in life.

 

Chapter 5 Topic A Mahajanapadas And Jainism Objective Type Questions

State whether the following statements are true or false

Question 1. In ancient India, a region greater than a village was called Jana.
Answer: True

Question 2. The word ‘Janapada’ originated from the word ‘Jana’.
Answer: True

Question 3. Around the 6th century BC, the large kingdoms came to be known as mahajanapadas.
Answer: True

Question 4. We come to know about the eighteen Mahajanapadas present in the Indian subcontinent in the 6th century BC.
Answer: False

Question 5. Most of the sixteen Mahajanapadas were part of modern northern and central India.
Answer: True

Question 6. Most of the Mahajanapadas grew up centering the Ganga-Yamuna Doad.
Answer: True

Question 7. In 6th century BC the Indus Valley region was the main political centre of the Indian subcontinent.
Answer: False

Question 8. The Mahajanapadas which were ruled by kings were called monarchical kingdoms.
Answer: True

Question 9. Magadha was a monarchical kingdom.
Answer: True

Question 10. Malla and Vrijji or Vajji were two important republics.
Answer: True

Question 11. The Vajjis who lived around Vaishali were called Lichhavis.
Answer: True

Question 12. The main preacher of Buddhism was called Tirthankara.
Answer: False

Question 13. Vardhhaman Mahavira was a Kshatriya prince belonging to the clan.
Answer: True

Question 14. Buddha became famous as ‘kebalin’.
Answer: False

Question 15. The main teachings of Jainism are contained in the 12 Angas.
Answer: True

 

Chapter 5 Topic A Mahajanapadas And Jainism Fill In The Blanks

By selecting the appropriate expression from the brackets

Question 1. Small kingdoms grew up centering a _________ (village/Jana/district).
Answer: Jana

Question 2. The power of the Janapadas started growing in the _________ (4th/5th/6th) century BC.
Answer: 6th

Question 3. The only Mahajanapada of South India was _________ (Koshala/Ashmaka/Vajji).
Answer: Ashmaka

Question 4. Magadha was a _________ (monarchical/democratic/republican) kingdom.
Answer: Monarchical

Question 5. _________ (Chedi/Avanti/Magadha) emerged as the most powerful Mahajanapada.
Answer: Magadha

Question 6. The capital of Vajji was _________ (Vaishali/Champa/Rajagriha).
Answer: Vaishali

Question 7. The reign of the Nanda dynasty ended in _________ (620 BC/324 BC/24 BC).
Answer: 324 BC

Question 8. Ajatashatru was the king of the Mahajanapada of _________ (Magadha/Koshala/Kuru).
Answer: Magadha

Question 9. The main preacher of _________ (Jain/ Buddhist/Aajivika) religion was called Tirthankara.
Answer: Jain

Question 10. The main principle of Jainism is _________ (Chaturyama/Ashtangikamarga/Ashwamedha Yajna).
Answer: Chaturyama

Question 11. The leader of the Digambara sect was _________ (Bhadrabahu / Sthulabhadra / Mahakashyapa).
Answer: Bhadrabahu

Question 12. Parshvanath was the prince of _________ (Kosala / Kashi /Avanti).
Answer: Kashi

Question 13. Parsvanath was a _________ (Jain Tirthankara, / King of Magadha /Preacher of Buddhism).
Answer: Jain Tirthankara

Question 14. Vardhhaman Mahavira was a prince of the _________ (Lichhavi / Maurya /Kushana).
Answer: Lichhavi

Question 15. Mahavira breathed his last in the city of _________ (Rajgir/Pawa /Kushinagar).
Answer: Pawa

Question 16. Mahavir meditated for _________ (11/12/13) years.
Answer: 12

Question 17. The leader of the Jain saints who migrated to south India was _________ (Bhadrabahu /Sthulabhadra /Seriba).
Answer: Bhadrabahu

Question 18. The leader of the Shwetambaras was _________ (Sthulabhadra / Bhadrabahu /Siddhartha).
Answer: Sthulabhadra

Question 19. The Ajivika community was formed by _________ (Mankhliputta Gosal / Sthulabhadra/Siddhartha).
Answer: Mankhliputta Gosal

Question 20. The Charvakas protested against _________ (Brahmanism / Jainism /Buddhism).
Answer: Brahmanism

 

Chapter 5 Topic A Mahajanapadas And Jainism Answer In A Complete Sentence

Question 1. How many Mahajanapadas were there in the Indian subcontinent in the 6th century BC?
Answer: There were sixteen Mahajanapadas in the Indian subcontinent in the 6th century BC.

Question 2. Name two non-monarchical mahajanapadas.
Answer: Two non-monarchical mahajanapadas were Malla and Vajji or Vriji.

Question 3. Which one of the sixteen mahajanapadas had later developed into an empire?
Answer: Magadha was one of the sixteen Mahajanapadas which later had developed into an empire.

Question 4. What was the capital of Vajjis?
Answer: The capital of Vajjis was Vaishali.

Question 5. What do you mean by janapada?
Answer: A region inhabited by common people is known as janapada.

Question 6. What do you mean by monarchical states?
Answer: The states where there was the rule of kings in known as monarchical states.

Question 7. Which was the only Mahajanapada of south India?
Answer: The only Mahajanapada of south India was Ashmaka.

Question 8. Who were known as the Lichhavis?
Answer: Lichhavis were the people who lived in Vaishali.

Question 9. Name two political centers of the Mallas.
Answer: Two political centers of the Mallas are Pawa and Kushinara.

Question 10. Who ruled Vajji?
Answer: A confederacy of clans ruled Vajji.

Question 11. Which was the principal site of political power in the Indian subcontinent during the 6th century BC.?
Answer: The Ganga-Yamuna Doab region was the principal site of political power in the Indian subcontinent during the 6th century BC.

Question 12. When did the rule of the Haryanka dynasty begin in Magadha?
Answer: The rule of the Haryanka dynasty began in 545 BC in Magadha.

Question 13. What is the importance of 324 BC in the history of ancient India?
Answer: In 324 BC the reign of Nanda dynasty came to an end.

Question 14. What was the capital of Magadha?
Answer: The capital of Magadha was Rajagriha.

Question 15. Where was the capital of Magadha transferred?
Answer: The capital of Magadha was transferred to Pataliputra.

Question 16. What do you mean by non-monarchical mahajanapadas?
Answer: Non-monarchical mahajanapadas were those mahajanapadas where there was no rule of king.

Question 17. Why did the non-monarchical maha- janapadas (gana or sangha or ganarajya) become weak?
Answer: The monarchical mahajanapadas became weak due to constant warfare with the monarchical mahajanapadas.

Question 18. Who was Ajatashatru?
Answer: Ajatashatru was the king of Magadha.

Question 19. Which two Mauryan emperors patronized the Ajivikas?
Answer: The two Mauryan emperors who patronized the Ajivikas were Bindusara and Ashoka.

Question 20. Name an important religion that emerged in the 6th century BC.
Answer: An important religion that emerged in the 6th century BC was Jainism.

Question 21. Who were called the Jains?
Answer: Followers of Jainism were called Jains.

Question 22. How many Tirthankaras were engaged in preaching Jainism?
Answer: Twenty-four Tirthankaras were engaged in preaching Jainism.

Question 23. Name the last two Jain Tirthankaras.
Answer: The last two Jain Tirthankaras were Parshvanath and Vardhhaman Mahavira.

Question 24. Who was the last Jain Tirthankara?
Answer: Vardhhaman Mahavira was the last Jain Tirthankara.

Question 25. Name the two groups into which Jainism came to be divided.
Answer: The two groups into which Jainism came to be divided were Digambara and Shwetambara.

Question 26. Name two religions which sought to substitute Brahmanism.
Answer: Two religions which sought to substitute Brahmanism were Jainism and Buddhism.

Question 27. Who was the twenty-third Jain Tirthankara?
Answer: Parshvanath was the twenty-third Jain Tirthankara.

Question 28. Why peasants did not agree to sacrifice animals?
Answer: The peasants did not agree to sacrifice animals because domesticated animals were required in works of agriculture.

Question 29. At what age Mahavira renounced the world and went to meditate?
Answer: Mahavira renounced the world and went to meditate at the age of thirty.

Question 30. In the ‘ganarajya’ who could not participate in discussions among the people about duties?
Answer: In the ‘ganarajya’ women and slaves could not participate in discussions among the people about duties.

Question 31. What is ‘Panchamahavrata’?
Answer: The five great vows of Jainism is called ‘Panchamahavrata’.

Question 32. What is ‘Chaturyama’?
Answer: The four great vows preached by Parshvanath is known as ‘Chaturyama’.

Question 33. What do you mean by ‘Anga’?
Answer: The basic principles of Jainism have been classified into twelve divisions and each of this division is called ‘Anga’.

Question 34. What is ‘Dwadash Anga’?
Answer: The basic principles of Jainism is classified into twelve sets or Angas which are collectively called ‘Dwadash Anga’.

Question 35. Which tenet was added to Chaturyama to constitute Panchamahavrata?
Answer: Mahavira added the tenet of Brahmacharya or celibacy to Chaturyama to constitute Panchamahavrata.

Question 36. Which Mauryan King embraced Jainism?
Answer: Chandragupta Maurya embraced Jainism.

Question 37. Name two states where Jainism was popular.
Answer: Jainism was popular in states like Magadha and Anga.

 

Chapter 5 Topic A Mahajanapadas And Jainism Select The Most Appropriate Option For The Following Statement

Question 1. In the 6th century BC large kingdoms were called Mahajanapadas.
1. Some of the small janapadas turned into big kingdoms.
2. The small janapadas merged with each other.
3. The population in the small janapadas increased.

Answer: 1. Some of the small janapadas turned into big kingdoms.

Question 2. In 6th century BC, the Gangetic valley region became the main political centre of the Indian subcontinent.
1. Fertile cultivable fields developed in this region.
2. Most of the Mahajanapadas grew up centering this region.
3. Factories were established in different parts of this region.

Answer: 2. Most of the Mahajanapadas grew up centering this region.

Question 3. Most of the Mahajanapadas were monarchical kingdoms.
1. The king was the supreme ruler and judge in these Mahajanapadas.
2. The Mahajanapadas were administered according to the king’s instructions.
3. All these Mahajanapadas were ruled by kings or monarchs.

Answer: 3. All these Mahajanapadas were ruled by kings or monarchs.

Question 4. Magadha was well safeguarded from external invasions.
1. Magadha was surrounded by rivers and hills.
2. The army of Magadha was very strong.
3. A high wall encircled the frontiers of Magadha.

Answer: 1. Magadha was surrounded by rivers and hills.

Question 5. In the 6th century BC the agri- cultural production increased very much.
1. Fertilisers began to be used in agricultural production.
2. Iron ploughs began to be used in agriculture.
3. Better quality seeds were sown.

Answer: 2. Iron ploughs began to be used in agriculture.

class 6 WBBSE History Question Answer

Question 6. The ritual of animal sacrifices in yajnas decreased in the 6th century BC.
1. Animal sacrifices became condemnable.
2. The clan leaders prohibited animal sacrifice.
3. The animals were used for drawing the ploughs.

Answer: 3. The animals were used for drawing the ploughs.

Question 7. The main tenets of Jainism are together called ‘Twelve Angas.’
1. Among the tenets of Jainism 12 of them were the most significant ones.
2. The tenets of Jainism were divided into 12 parts.
3. About 12 Tirthankaras had preached Jainism.

Answer: 2. The tenets of Jainism were divided into 12 parts.

Question 8. In the 6th century BC, the Kshatriyas demanded an equality of power with the Brahmins.
1. The weapons made of iron increased the power of the Kshatriyas.
2. The social status of the Kshatriyas had increased.
3. The Kshatriyas started participating in the administration.

Answer: 1. The weapons made of iron increased the power of the Kshatriyas.

Chapter 5 Topic A Mahajanapadas And Jainism Multiple Choice Questions

Question 1. Magadha was a

  1. Mahajanapada
  2. Sangha
  3. Janapada
  4. Temple

Answer: 1. Mahajanapada

Question 2. Most of the mahajanapadas were in the

  1. Ganga-Yamuna Doab
  2. Narmada Valley
  3. Godavari Valley
  4. Punjab region

Answer: 1. Ganga-Yamuna Doab

Question 3. The mahajanapadas emerged in

  1. 7th century BC
  2. 6th century BC
  3. 1st century BC
  4. 5th century BC

Answer: 2. 6th century BC

Question 4. The mahajanapada which became the most powerful was

  1. Kamboja
  2. Magadha
  3. Gandhara
  4. Vajji

Answer: 2. Magadha

Question 5. In the monarchies at the head of the 13. Food production increased with the use of administration stood the

  1. Administrator
  2. King
  3. Brahmans
  4. Queen

Answer: 2. King

class 6 WBBSE History Question Answer

Question 6. In the mahajanapadas the king was assisted in administration by

  1. Governor
  2. A Committee
  3. Mantri
  4. Prince

Answer:  2. A Committee

Question 7. In the kingdoms, land revenue which was collected was used for

  1. Administration
  2. Religious Purpose
  3. The King
  4. Warfare

Answer:  1. Administration

Question 8. The last ruling dynasty of Magadha mahajanapada was

  1. Haryanka dynasty
  2. Nanda dynasty
  3. Shaishunaaga dynasty
  4. Maurya dynasty

Answer: 2. Nanda dynasty

Question 9. The non-monarchical mahajanapadas were known as

  1. Ganarajya
  2. Janas
  3. Jangan
  4. Nagara

Answer: 1. Ganarajya

Question 10. A confederacy of clans used to rule

  1. Magadha
  2. Vajji
  3. Koshala
  4. Gandhara

Answer: 2. Vajji

Question 11. The king of Magadha who prepared to attack the Vajjis was

  1. Ajatashatru
  2. Bindusara
  3. Ashoka
  4. Bimbisara

Answer: 1. Ajatashatru

class 6 WBBSE History Question Answer

Question 12. The society, economy, and politics of the Indian subcontinent began to change around the

  1. 5th century BC
  2. 6th century BC
  3. 4th century BC
  4. 7th century BC

Answer: 2. 6th century BC

Question 13. Food production increased with the use of ploughs made of

  1. Copper
  2. Wood
  3. Iron
  4. Stone

Answer: 3. Iron

Question 14. The preachers of Jainism were known as

  1. Tirthankaras
  2. Hinayanas
  3. Mahayana
  4. Guruji

Answer: 1. Tirthankaras

Question 15. The influence of Jainism was on the rise during the rule of the

  1. Nandas
  2. Haryana
  3. Mauryas
  4. Kushanas

Answer: 3. Mauryas

Question 16. The Ajivika community was formed by

  1. Bhadrabahu
  2. Mankhliputta Gosal
  3. Sthulabhadra
  4. Siddhartha

Answer: 2. Mankhliputta Gosal