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

Question # 2

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

Question # 3

In case of an ideal gas, the P.E associated with its molecule is

Question # 4

The state in which ice, water and vapour coexists in equilibrium is called

Question # 5

The example of reversible process is

Question # 6

Gas constant per molecule is called:

Question # 7

At absolute temperature, the kinetic energy of the molecules

Question # 8

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

Question # 9

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

Question # 10

The earliest heat engine was

Question # 11

When heat is removed from the system

Question # 12

On colliding in a closed container, the gas molecules

Question # 13

Which quantity is important in stating the entropy of the system

Question # 14

The pressure exerted by the gas is

Question # 15

The work done on the system by the environment is considered as

Question # 16

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 # 17

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 18

Efficiency of carnot engine is independent of the

Question # 19

Maximum density of H2O is at the temperature

Question # 20

Brownian motion increases due to

Question # 21

A diatomic gas molecule has

Question # 22

The internal energy of a system does not depend upon the

Question # 23

The curve representing an adiabatic process is called

Question # 24

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 # 25

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 # 26

The concept of entropy was introduced into the study of thermodynamics in

Question # 27

Pressure exerted by a gas is

Question # 28

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 29

The bicycle pump provides a good example of

Question # 30

Truth of kinetic energy is confirmed by:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
2 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
3 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
4 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
5 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
6 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
7 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
8 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
9 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
10 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

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