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 kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 2

The temperature of gas is produced by

Question # 3

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

Question # 4

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

Question # 5

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 6

While deriving the equation for pressure of a gas we consider the

Question # 7

Melting point of ice

Question # 8

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

Question # 9

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 10

We cannot utilize the heat contents of oceans and atmosphere because

Question # 11

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

Question # 12

On colliding in a closed container, the gas molecules

Question # 13

The absolute temperature of the tripple point of water is

Question # 14

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

Question # 15

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

Question # 16

The state in which ice, water and vapour coexists in equilibrium is called

Question # 17

The unit of thermodynamical scale is

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 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 # 20

If the distance between two charges is doubled, the force between them will become:

Question # 21

Which of the following does not have the same units:

Question # 22

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 23

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 24

A real gas can be approximated to an ideal gas at

Question # 25

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

Question # 26

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

Question # 27

In an adiabatic process the work is done at the expense of the

Question # 28

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 29

We can express the work in term of

Question # 30

The internal energy of a system does not depend upon the

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
2 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
3 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
4 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
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 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
7 It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
8 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
9 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
10 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them

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