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

In a heat engine, heat is supplied by the

Question # 2

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 # 3

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

Question # 4

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

Question # 5

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 # 6

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 # 7

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

Question # 8

The curve representing an isothermal process is called

Question # 9

First law of thermodynamics is consequence of conservation of

Question # 10

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 11

Pressure exerted by a gas is

Question # 12

At absolute temperature, the kinetic energy of the molecules

Question # 13

A heat engine is that which converts

Question # 14

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

Question # 15

Pressure of a gas at constant volume is proportion to

Question # 16

The curve representing an adiabatic process is called

Question # 17

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 18

Gas constant per molecule is called:

Question # 19

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

Question # 20

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 21

A real gas can be approximated to an ideal gas at

Question # 22

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

Question # 23

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 24

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

Question # 25

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 26

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

Question # 27

Hotness and coldness of an object is represented in terms:

Question # 28

At constant volume temperature is increased. Then

Question # 29

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

Question # 30

Generally a temperature scale is established by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
2 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
3 The behaviour of gases is well accounted by the kinetic theory based on
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them
4 If water in a closed bottle is taken up to the moon and opened, the water gets
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
5 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
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 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
8 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
9 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
10 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force

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