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

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 2

If the formula PV = nRT, n denotes:

Question # 3

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

Question # 4

Electromagnetic waves emitted by hot bodies are called:

Question # 5

Pressure exerted by a gas is

Question # 6

In a heat engine, heat is supplied by the

Question # 7

Generally a temperature scale is established by

Question # 8

The nature of thermal radiation is similar to:

Question # 9

The behaviour of gases is well accounted by the kinetic theory based on

Question # 10

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

Question # 11

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

Question # 12

Internal energy is the sum of all the forms of

Question # 13

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 # 14

The curve representing an adiabatic process is called

Question # 15

Absolute zero is considered as that temperature at which:

Question # 16

Melting point of ice

Question # 17

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 18

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 19

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

Question # 20

The Boltzman constant has the value

Question # 21

First law of thermodynamic is special case of

Question # 22

The motion of molecules in gases is:

Question # 23

Maximum density of H2O is at the temperature

Question # 24

Real gases strictly obey gas law at:

Question # 25

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 26

The volume of universal gas constant R is:

Question # 27

In the formula P = N0KT, N0denotes:

Question # 28

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

Question # 29

Efficiency of carnot engine is independent of the

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 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
2 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
3 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
4 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
5 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
6 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
7 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
8 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
9 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
10 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity

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