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

00:00
Question # 1

The temperature scale approved in SI units is:

Question # 2

A reversible cycle is the one in which

Question # 3

Adiabatic change occurs when the gas

Question # 4

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 5

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

Question # 6

Triple point of water is

Question # 7

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

Question # 8

Which of the following is not thermo dynamical function?

Question # 9

A heat engine is that which converts

Question # 10

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

Question # 11

If the volume of the gas is to be increased by 4 times, then

Question # 12

At absolute temperature, the kinetic energy of the molecules

Question # 13

Absolute zero is considered as that temperature at which:

Question # 14

Maximum density of H2O is at the temperature

Question # 15

In thermodynamics, internal energy is the function of

Question # 16

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

Question # 17

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

Question # 18

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 19

If the formula PV = nRT, n denotes:

Question # 20

Gas constant per molecule is called:

Question # 21

During the whole carnot cycle

Question # 22

At O° K which of the following properties of a gas will be zero?

Question # 23

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

Question # 24

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

Question # 25

A real gas can be approximated to an ideal gas at

Question # 26

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

Question # 27

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 28

Efficiency of carnot engine is independent of the

Question # 29

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

Question # 30

Pressure exerted by a gas is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
3 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
4 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
5 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
6 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
7 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
8 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
9 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
10 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules

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