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

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

Question # 2

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 3

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

Question # 4

Which of the following is not an assumption of kinetic energy

Question # 5

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 # 6

Absolute zero is considered as that temperature at which:

Question # 7

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

Question # 8

Sadi carnot described an ideal heat engine in

Question # 9

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

Question # 10

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 11

A succession of events which bring the system back to its initial condition is called

Question # 12

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

Question # 13

In thermodynamics, internal energy is the function of

Question # 14

Pressure of a gas at constant volume is proportion to

Question # 15

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

Question # 16

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 17

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

Question # 18

A process is a reversible process, if the entropy of the system

Question # 19

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

Question # 20

A diatomic gas molecule has

Question # 21

Hotness and coldness of an object is represented in terms:

Question # 22

Internal energy is the sum of all the forms of

Question # 23

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 24

The rate of change of momentum of a molecule is equal to:

Question # 25

A heat engine is that which converts

Question # 26

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 # 27

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

Question # 28

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

Question # 29

The earliest heat engine was

Question # 30

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
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 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
4 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
5 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
6 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
7 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
8 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
9 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
10 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume

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