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 ideal gas law is

Question # 2

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

Question # 3

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 4

The motion of molecules in gases is:

Question # 5

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

Question # 6

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 7

The curve representing an adiabatic process is called

Question # 8

An isochoric process is one which take place at

Question # 9

At constant volume temperature is increased. Then

Question # 10

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 11

The absolute temperature of the tripple point of water is

Question # 12

The relationship between Boltzmann constant k with R and NAis given as:

Question # 13

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 14

Pressure may be define as _______ per second per unit area:

Question # 15

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

Question # 16

The pressure exerted by the gas is

Question # 17

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 18

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

Question # 19

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

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

A heat engine is that which converts

Question # 22

The example of irreversible process is

Question # 23

Which of the following does not have the same units:

Question # 24

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

Question # 25

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

Question # 26

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 27

No spark plug is needed in

Question # 28

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

Question # 29

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 # 30

In case of an ideal gas, the P.E associated with its molecule is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
2 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
3 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
4 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
5 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
6 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
7 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
8 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
9 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
10 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them

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