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

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 2

Absolute temperature can be calculated by

Question # 3

In thermodynamics, internal energy is the function of

Question # 4

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 # 5

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 6

A diatomic gas molecule has

Question # 7

If the formula PV = nRT, n denotes:

Question # 8

Carnot heat engine only used

Question # 9

Which of the following is not an assumption of kinetic energy

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

When heat is removed from the system

Question # 14

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

Question # 15

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

Question # 16

When two objects are rubbed together, their internal energy

Question # 17

Maximum density of H2O is at the temperature

Question # 18

On colliding in a closed container, the gas molecules

Question # 19

Triple point of water is

Question # 20

At constant volume temperature is increased. Then

Question # 21

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 22

At absolute temperature, the kinetic energy of the molecules

Question # 23

The earliest heat engine was

Question # 24

The absolute temperature of the tripple point of water is

Question # 25

Efficiency of carnot engine is independent of the

Question # 26

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

Question # 27

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

Question # 28

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 # 29

Which of the following is a state variable

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
2 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
3 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
4 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
5 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
6 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
7 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
8 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
9 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
10 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them

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