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

Which of the following is not an example of adiabatic process

Question # 2

The absolute temperature for an ideal gas is

Question # 3

The value of E0in coulomb's law is:

Question # 4

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

Question # 5

Adiabatic change occurs when the gas

Question # 6

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

Question # 7

The Boltzman constant has the value

Question # 8

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

Question # 9

Efficiency of carnot engine is independent of the

Question # 10

Energy gas behaves like an ideal gast at

Question # 11

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 # 12

The temperature scale approved in SI units is:

Question # 13

The disorder in the system increases due to the

Question # 14

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 # 15

In the formula P = N0KT, N0denotes:

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 21

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

Question # 22

An isochoric process is one which take place at

Question # 23

The temperature of gas is produced by

Question # 24

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

Question # 25

First law of thermodynamics is consequence of conservation of

Question # 26

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

Question # 27

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

Question # 28

Rice takes longest to cook

Question # 29

Absolute temperature can be calculated 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 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
A. 0°C
B. 10°C
C. 17°C
D. 20°C
2 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
3 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
4 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
5 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
6 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
7 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them
8 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
9 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
10 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E

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