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

Brownian motion increases due to

Question # 2

The volume of universal gas constant R is:

Question # 3

Energy gas behaves like an ideal gast at

Question # 4

Heat travels through vacuum by

Question # 5

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

Question # 6

Good absorbers of heat are

Question # 7

Which of the following does not have the same units:

Question # 8

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

Question # 9

The example of irreversible process is

Question # 10

First law of thermodynamic is special case of

Question # 11

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

Question # 12

When heat is added into the system then change in entropy is

Question # 13

The bicycle pump provides a good example of

Question # 14

Hotness and coldness of an object is represented in terms:

Question # 15

In an ideal gas, the molecules have:

Question # 16

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

Question # 17

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

Question # 18

Generally a temperature scale is established by

Question # 19

Internal energy is the sum of all the forms of

Question # 20

Triple point of water is

Question # 21

For the working of a heat engine, there must be

Question # 22

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

Question # 23

Electromagnetic waves emitted by hot bodies are called:

Question # 24

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

Question # 25

In a heat engine, heat is supplied by the

Question # 26

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 27

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

Question # 28

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

Question # 29

The unit of thermodynamical scale is

Question # 30

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
2 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
3 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
4 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
5 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
6 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
7 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
8 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
9 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
10 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done

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