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

When heat is added into the system then change in entropy is

Question # 2

The example of irreversible process is

Question # 3

A process in which no heat enters or leaves the system is called

Question # 4

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 5

If the volume of the gas is to be increased by 4 times, then

Question # 6

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

Question # 7

During the whole carnot cycle

Question # 8

The bicycle pump provides a good example of

Question # 9

In the formula P = N0KT, N0denotes:

Question # 10

Rate of diffusion is

Question # 11

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

Question # 12

Boyle's law is applicable in

Question # 13

For the working of a heat engine, there must be

Question # 14

Internal energy is the sum of all the forms of

Question # 15

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 16

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

Question # 17

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

Question # 18

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 19

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 20

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

Question # 21

When two objects are rubbed together, their internal energy

Question # 22

The internal energy of a system does not depend upon the

Question # 23

Carnot heat engine only used

Question # 24

In thermodynamics, internal energy is the function of

Question # 25

If an amount of heat enters the system it could

Question # 26

Absolute zero is considered as that temperature at which:

Question # 27

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 28

Which of the following is a state variable

Question # 29

The temperature scale approved in SI units is:

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
2 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
3 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
4 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
5 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
6 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
7 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
8 The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to
A. 0°C
B. 10°C
C. 17°C
D. 20°C
9 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
10 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them

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