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

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

Question # 2

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

Question # 3

The absolute temperature of the tripple point of water is

Question # 4

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

Question # 5

Which of the following is not an example of adiabatic process

Question # 6

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 7

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

Question # 8

The unit of thermodynamical scale is

Question # 9

No spark plug is needed in

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Energy gas behaves like an ideal gast at

Question # 14

In the study of thermodynamics, which gas is considered as the working substance

Question # 15

At constant volume temperature is increased. Then

Question # 16

If the distance between two charges is doubled, the force between them will become:

Question # 17

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 # 18

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

Question # 19

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

Question # 20

On colliding in a closed container, the gas molecules

Question # 21

A diatomic gas molecule has

Question # 22

Pressure of a gas at constant volume is proportion to

Question # 23

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 24

During the whole carnot cycle

Question # 25

Melting point of ice

Question # 26

Good absorbers of heat are

Question # 27

A heat engine is that which converts

Question # 28

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 29

The temperature scale approved in SI units is:

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
2 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
3 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
4 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
5 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
6 The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to
A. 300°C
B. 573°C
C. 600°C
D. 743°C
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 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 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
10 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy

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