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

We can express the work in term of

Question # 2

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 3

The disorder in the system increases due to the

Question # 4

The nature of thermal radiation is similar to:

Question # 5

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 6

Truth of kinetic energy is confirmed by:

Question # 7

The number of translation degress of freedom for a diatomic gas is

Question # 8

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

Question # 9

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 # 10

The internal energy of an ideal gas system is generally the

Question # 11

Gas constant per molecule is called:

Question # 12

The value of E0in coulomb's law is:

Question # 13

If the formula PV = nRT, n denotes:

Question # 14

Real gases strictly obey gas law at:

Question # 15

The internal energy of a system does not depend upon the

Question # 16

The earliest heat engine was

Question # 17

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

Question # 18

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

Question # 19

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 20

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

Question # 21

A reversible cycle is the one in which

Question # 22

On colliding in a closed container, the gas molecules

Question # 23

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

Question # 24

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

Question # 25

In the formula P = N0KT, N0denotes:

Question # 26

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 27

Which of the following is a state variable

Question # 28

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 29

When heat is removed from the system

Question # 30

Which of the following does not have the same units:

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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 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
3 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
4 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
5 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
6 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
7 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
8 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
9 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
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
10 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %

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