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

A process is a reversible process, if the entropy of the system

Question # 2

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 3

In an adiabatic expansion, the temperature of the gas

Question # 4

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 5

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

Question # 6

A diatomic gas molecule has

Question # 7

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

Question # 8

Which of the following is a state variable

Question # 9

Heat travels through vacuum by

Question # 10

The internal energy of a system does not depend upon the

Question # 11

Gas constant per molecule is called:

Question # 12

Good absorbers of heat are

Question # 13

Average KE of a gas molecule has:

Question # 14

The value of E0in coulomb's law is:

Question # 15

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 16

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

Question # 17

Rate of diffusion is

Question # 18

We cannot utilize the heat contents of oceans and atmosphere because

Question # 19

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

Question # 20

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

Question # 21

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 22

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

Question # 23

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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

The volume of universal gas constant R is:

Question # 26

The example of irreversible process is

Question # 27

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

Question # 28

The temperature scale approved in SI units is:

Question # 29

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

Question # 30

Truth of kinetic energy is confirmed by:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
2 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
A. 0 J
B. 2 J
C. 5 J
D. 10 J
3 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
4 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
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 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
8 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
9 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
10 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them

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