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

Question # 2

Absolute zero is considered as that temperature at which:

Question # 3

Rice takes longest to cook

Question # 4

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

Question # 5

One kilogram of different substances contain

Question # 6

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

Question # 7

The temperature of gas is produced by

Question # 8

First law of thermodynamic is special case of

Question # 9

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

Question # 10

The absolute temperature for an ideal gas is

Question # 11

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 12

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

Question # 13

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

Question # 14

In a heat engine, heat is supplied by the

Question # 15

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 # 16

When heat is removed from the system

Question # 17

In an ideal gas, the molecules have:

Question # 18

The Boltzman constant has the value

Question # 19

No spark plug is needed in

Question # 20

Energy gas behaves like an ideal gast at

Question # 21

The internal energy of an ideal gas system is generally the

Question # 22

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

Question # 23

One mole of any substance contain

Question # 24

First law of thermodynamics is consequence of conservation of

Question # 25

Absolute temperature can be calculated by

Question # 26

The ideal gas law is

Question # 27

Generally a temperature scale is established by

Question # 28

At constant volume temperature is increased. Then

Question # 29

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
2 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
3 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
4 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
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
5 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
6 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
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
7 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
8 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
9 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
10 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them

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