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

00:00
Question # 1

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 2

Pressure of a gas at constant volume is proportion to

Question # 3

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

Question # 4

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

Question # 5

In an adiabatic expansion, the temperature of the gas

Question # 6

Electromagnetic waves emitted by hot bodies are called:

Question # 7

The rate of change of momentum of a molecule is equal to:

Question # 8

The temperature scale approved in SI units is:

Question # 9

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 10

Good absorbers of heat are

Question # 11

We can express the work in term of

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

At absolute temperature, the kinetic energy of the molecules

Question # 16

A real gas can be approximated to an ideal gas at

Question # 17

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

Question # 18

One kilogram of different substances contain

Question # 19

The efficiency of diesel engine is

Question # 20

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 21

While deriving the equation for pressure of a gas we consider the

Question # 22

In the formula P = N0KT, N0denotes:

Question # 23

The nature of thermal radiation is similar to:

Question # 24

The relationship between Boltzmann constant k with R and NAis given as:

Question # 25

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

Question # 26

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

Question # 27

Absolute zero is considered as that temperature at which:

Question # 28

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

Question # 29

If an amount of heat enters the system it could

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
2 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
3 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
4 The process which is carried out at constant temperature is known as
A. adiabatic process
B. isothermal process
C. isochoric process
D. none of them
5 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
6 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
7 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
8 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
9 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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
10 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these

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