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

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

Question # 3

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

Question # 4

One kilogram of different substances contain

Question # 5

We cannot utilize the heat contents of oceans and atmosphere because

Question # 6

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

Question # 7

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

Question # 8

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 # 9

The curve representing an isothermal process is called

Question # 10

When two objects are rubbed together, their internal energy

Question # 11

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

Question # 12

The relationship between Boltzmann constant k with R and NAis given as:

Question # 13

One mole of any substance contain

Question # 14

Energy gas behaves like an ideal gast at

Question # 15

Hotness and coldness of an object is represented in terms:

Question # 16

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

Question # 17

Real gases strictly obey gas law at:

Question # 18

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

Question # 19

The absolute temperature of the tripple point of water is

Question # 20

Rate of diffusion is

Question # 21

Boyle's law is applicable in

Question # 22

Which of the following is not an example of adiabatic process

Question # 23

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

Question # 24

When heat is removed from the system

Question # 25

In the formula P = N0KT, N0denotes:

Question # 26

Generally a temperature scale is established by

Question # 27

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

Question # 28

Absolute temperature can be calculated by

Question # 29

A heat engine is that which converts

Question # 30

In an ideal gas, the molecules have:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
2 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
3 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
4 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
5 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
6 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
7 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
A. 0 J
B. 2 J
C. 5 J
D. 10 J
8 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
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
9 The process which is carried out at constant temperature is known as
A. adiabatic process
B. isothermal process
C. isochoric process
D. none of them
10 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine

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