ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

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

A reversible cycle is the one in which

Question # 2

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 3

Absolute temperature can be calculated by

Question # 4

The curve representing an isothermal process is called

Question # 5

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

Question # 6

Efficiency of carnot engine is independent of the

Question # 7

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 8

Adiabatic change occurs when the gas

Question # 9

A heat engine is that which converts

Question # 10

A diatomic gas molecule has

Question # 11

The percentage of available heat energy converted into work by a diesel engine is roughly

Question # 12

The internal energy of a system does not depend upon the

Question # 13

Heat travels through vacuum by

Question # 14

Pressure exerted by a gas is

Question # 15

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

Question # 16

In thermodynamics, internal energy is the function of

Question # 17

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

Question # 18

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 19

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

Question # 20

Generally a temperature scale is established by

Question # 21

Which of the following does not have the same units:

Question # 22

During the whole carnot cycle

Question # 23

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

Question # 24

The number of translation degress of freedom for a diatomic gas is

Question # 25

At constant volume temperature is increased. Then

Question # 26

The ideal gas law is

Question # 27

The example of reversible process is

Question # 28

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 # 29

Electromagnetic waves emitted by hot bodies are called:

Question # 30

If an amount of heat enters the system it could

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
2 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
3 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
4 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
5 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
6 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
7 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
8 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
9 The volume of universal gas constant R is:
A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
10 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

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