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

Good absorbers of heat are

Question # 2

At absolute temperature, the kinetic energy of the molecules

Question # 3

Adiabatic change occurs when the gas

Question # 4

The Boltzman constant has the value

Question # 5

An isochoric process is one which take place at

Question # 6

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

Question # 7

The absolute temperature for an ideal gas is

Question # 8

Boyle's law is applicable in

Question # 9

Which of the following does not have the same units:

Question # 10

Triple point of water is

Question # 11

A reversible cycle is the one in which

Question # 12

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

Question # 13

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

Question # 14

One mole of any substance contain

Question # 15

Absolute zero is considered as that temperature at which:

Question # 16

Which quantity is important in stating the entropy of the system

Question # 17

Pressure may be define as _______ per second per unit area:

Question # 18

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 19

A process in which no heat enters or leaves the system is called

Question # 20

Absolute temperature can be calculated by

Question # 21

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

Question # 22

The curve representing an isothermal process is called

Question # 23

We can express the work in term of

Question # 24

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

Question # 25

According to kinetic theory of gases, molecules of a gas behave like

Question # 26

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

Question # 27

Energy gas behaves like an ideal gast at

Question # 28

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

Question # 29

The process which is carried out at constant temperature is known as

Question # 30

If water in a closed bottle is taken up to the moon and opened, the water gets

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
2 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
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 thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
5 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them
6 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
7 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
8 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
9 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
10 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these

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