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

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

Question # 2

When two objects are rubbed together, their internal energy

Question # 3

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

Question # 4

The Boltzman constant has the value

Question # 5

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

Question # 6

First law of thermodynamic is special case of

Question # 7

If the formula PV = nRT, n denotes:

Question # 8

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

Question # 9

The example of reversible process is

Question # 10

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 11

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

Question # 12

Hotness and coldness of an object is represented in terms:

Question # 13

The basis to define a temperature scale that is independent of material properties is provided by

Question # 14

Triple point of water is

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

If an amount of heat enters the system it could

Question # 20

Sadi carnot described an ideal heat engine in

Question # 21

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

Question # 22

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

Question # 23

The volume of universal gas constant R is:

Question # 24

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 # 25

First law of thermodynamics is consequence of conservation of

Question # 26

Boyle's law is applicable in

Question # 27

The product of the pressure and volume of an ideal gas is

Question # 28

The value of E0in coulomb's law is:

Question # 29

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

Question # 30

Real gases strictly obey gas law at:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
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 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
4 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
5 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
6 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
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 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
9 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
10 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6

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