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

One kilogram of different substances contain

Question # 2

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 # 3

Triple point of water is

Question # 4

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

Question # 5

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

Question # 6

Which of the following does not have the same units:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Which quantity is important in stating the entropy of the system

Question # 11

The temperature of gas is produced by

Question # 12

Good absorbers of heat are

Question # 13

For the working of a heat engine, there must be

Question # 14

We cannot utilize the heat contents of oceans and atmosphere because

Question # 15

Maximum density of H2O is at the temperature

Question # 16

The concept of entropy was introduced into the study of thermodynamics in

Question # 17

Carnot heat engine only used

Question # 18

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

Question # 19

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

Question # 20

In the study of thermodynamics, which gas is considered as the working substance

Question # 21

The unit of thermodynamical scale is

Question # 22

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 23

A reversible cycle is the one in which

Question # 24

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

Question # 25

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

Question # 26

According to the second law, which is must to produce work

Question # 27

Melting point of ice

Question # 28

If the volume of the gas is to be increased by 4 times, then

Question # 29

The example of reversible process is

Question # 30

Generally a temperature scale is established by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
2 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
3 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
4 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
5 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
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 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
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 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
10 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4

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