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

Absolute zero is considered as that temperature at which:

Question # 2

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 3

The volume of universal gas constant R is:

Question # 4

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

Question # 5

In the theory of dimensional analysis, heat may be properly represented by:

Question # 6

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

Question # 7

The ideal gas law is

Question # 8

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 9

When two objects are rubbed together, their internal energy

Question # 10

The temperature of gas is produced by

Question # 11

When heat is added into the system then change in entropy is

Question # 12

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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 # 17

The curve representing an isothermal process is called

Question # 18

If the formula PV = nRT, n denotes:

Question # 19

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 20

Pressure exerted by a gas is

Question # 21

Gas constant per molecule is called:

Question # 22

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

Question # 23

According to the second law, which is must to produce work

Question # 24

A reversible cycle is the one in which

Question # 25

For the working of a heat engine, there must be

Question # 26

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 27

The temperature scale approved in SI units is:

Question # 28

The absolute temperature of the tripple point of water is

Question # 29

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

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 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
2 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
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 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
5 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
6 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
7 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
8 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
9 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
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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