ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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Question # 1

The temperature of gas is produced by

Question # 2

First law of thermodynamics is consequence of conservation of

Question # 3

In the formula P = N0KT, N0denotes:

Question # 4

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 5

The bicycle pump provides a good example of

Question # 6

When heat is removed from the system

Question # 7

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 8

The internal energy of a system does not depend upon the

Question # 9

Sadi carnot described an ideal heat engine in

Question # 10

The work done on the system by the environment is considered as

Question # 11

In case of an ideal gas, the P.E associated with its molecule is

Question # 12

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 13

One mole of any substance contain

Question # 14

In the theory of dimensional analysis, heat may be properly represented by:

Question # 15

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 16

Carnot heat engine only used

Question # 17

First law of thermodynamic is special case of

Question # 18

The example of irreversible process is

Question # 19

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 20

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 21

Gas constant per molecule is called:

Question # 22

If the formula PV = nRT, n denotes:

Question # 23

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 24

The nature of thermal radiation is similar to:

Question # 25

Brownian motion increases due to

Question # 26

Rate of diffusion is

Question # 27

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 28

Melting point of ice

Question # 29

The process which is carried out at constant temperature is known as

Question # 30

For the working of a heat engine, there must be

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
2 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
3 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
4 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
5 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
6 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
7 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
8 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
9 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
10 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve

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