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

One kilogram of different substances contain

Question # 2

On colliding in a closed container, the gas molecules

Question # 3

Carnot heat engine only used

Question # 4

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 5

The behaviour of gases is well accounted by the kinetic theory based on

Question # 6

A real gas can be approximated to an ideal gas at

Question # 7

A reversible cycle is the one in which

Question # 8

In the formula P = N0KT, N0denotes:

Question # 9

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 10

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 11

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 12

The nature of thermal radiation is similar to:

Question # 13

Electromagnetic waves emitted by hot bodies are called:

Question # 14

Which quantity is important in stating the entropy of the system

Question # 15

We can express the work in term of

Question # 16

In an adiabatic process the work is done at the expense of the

Question # 17

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 18

Which of the following is not an assumption of kinetic energy

Question # 19

Rate of diffusion is

Question # 20

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 21

Which of the following is not an example of adiabatic process

Question # 22

Brownian motion increases due to

Question # 23

Pressure may be define as _______ per second per unit area:

Question # 24

One mole of any substance contain

Question # 25

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 26

The efficiency of diesel engine is

Question # 27

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 28

Which of the following does not have the same units:

Question # 29

The internal energy of an ideal gas system is generally the

Question # 30

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
2 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
3 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
4 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
5 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
6 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
7 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
8 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
9 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
10 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them

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