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 R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 2

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 3

A real gas can be approximated to an ideal gas at

Question # 4

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 # 5

A reversible cycle is the one in which

Question # 6

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

Question # 7

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

Question # 8

One mole of any substance contain

Question # 9

The pressure exerted by the gas is

Question # 10

The disorder in the system increases due to the

Question # 11

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

Question # 12

If an amount of heat enters the system it could

Question # 13

A succession of events which bring the system back to its initial condition is called

Question # 14

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

Question # 15

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 16

Electromagnetic waves emitted by hot bodies are called:

Question # 17

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

Question # 18

The value of E0in coulomb's law is:

Question # 19

Which of the following is a state variable

Question # 20

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 21

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

Question # 22

In an adiabatic expansion, the temperature of the gas

Question # 23

Melting point of ice

Question # 24

A process in which no heat enters or leaves the system is called

Question # 25

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 26

One kilogram of different substances contain

Question # 27

The unit of thermodynamical scale is

Question # 28

A diatomic gas molecule has

Question # 29

Energy gas behaves like an ideal gast at

Question # 30

At absolute temperature, the kinetic energy of the molecules

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
2 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
3 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
4 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
5 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
6 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
7 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
8 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
9 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
10 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them

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