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

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

Question # 2

When two objects are rubbed together, their internal energy

Question # 3

Average KE of a gas molecule has:

Question # 4

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 5

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

Question # 6

The efficiency of diesel engine is

Question # 7

According to kinetic theory of gases, molecules of a gas behave like

Question # 8

No spark plug is needed in

Question # 9

The Boltzman constant has the value

Question # 10

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

Question # 11

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 # 12

The pressure exerted by the gas is

Question # 13

The product of the pressure and volume of an ideal gas is

Question # 14

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 15

Real gases strictly obey gas law at:

Question # 16

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 17

Energy gas behaves like an ideal gast at

Question # 18

When heat is removed from the system

Question # 19

The earliest heat engine was

Question # 20

The nature of thermal radiation is similar to:

Question # 21

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

Question # 22

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

Question # 23

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 # 24

During the whole carnot cycle

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

The curve representing an isothermal process is called

Question # 29

Boyle's law is applicable in

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
2 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
3 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
4 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
5 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
6 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
7 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
8 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
9 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
10 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them

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