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

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 2

The temperature scale approved in SI units is:

Question # 3

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 4

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 5

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 6

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 # 7

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 8

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

Question # 9

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 10

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 11

The ideal gas law is

Question # 12

The example of irreversible process is

Question # 13

Melting point of ice

Question # 14

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 15

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

Question # 16

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

Question # 17

Absolute zero is considered as that temperature at which:

Question # 18

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 19

A heat engine is that which converts

Question # 20

According to the second law, which is must to produce work

Question # 21

Truth of kinetic energy is confirmed by:

Question # 22

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 23

The only significant motion possessed by the mono-atomic gas represented is:

Question # 24

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

Question # 25

Which of the following is not an example of adiabatic process

Question # 26

Hotness and coldness of an object is represented in terms:

Question # 27

The second law of thermodynamics is concerned with the circumstances in which

Question # 28

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 29

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
2 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
3 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
4 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
5 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
6 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
7 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
8 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
9 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
10 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure

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