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

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

Question # 2

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 3

When two objects come to common temperature, the body is said to be in:

Question # 4

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

Question # 5

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 6

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

Question # 7

Maximum density of H2O is at the temperature

Question # 8

Which of the following is not an example of adiabatic process

Question # 9

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

Question # 10

A diatomic gas molecule has

Question # 11

Which quantity is important in stating the entropy of the system

Question # 12

Electromagnetic waves emitted by hot bodies are called:

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

Which of the following does not have the same units:

Question # 15

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

Question # 16

For the working of a heat engine, there must be

Question # 17

A carnot cycle consists of

Question # 18

Efficiency of carnot engine is independent of the

Question # 19

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

Question # 20

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 21

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

Question # 22

We cannot utilize the heat contents of oceans and atmosphere because

Question # 23

Triple point of water is

Question # 24

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

Question # 25

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 26

A real gas can be approximated to an ideal gas at

Question # 27

The disorder in the system increases due to the

Question # 28

A succession of events which bring the system back to its initial condition is called

Question # 29

The product of the pressure and volume of an ideal gas is

Question # 30

The ideal gas law is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
2 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
3 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
4 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
5 First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them
6 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
7 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
8 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
9 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
10 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them

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