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

Maximum density of H2O is at the temperature

Question # 2

Generally a temperature scale is established by

Question # 3

The curve representing an isothermal process is called

Question # 4

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 5

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 # 6

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 7

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 8

Melting point of ice

Question # 9

The curve representing an adiabatic process is called

Question # 10

Adiabatic change occurs when the gas

Question # 11

The volume of universal gas constant R is:

Question # 12

The disorder in the system increases due to the

Question # 13

First law of thermodynamics is consequence of conservation of

Question # 14

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

Question # 15

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 16

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 17

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 # 18

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

Question # 19

For the working of a heat engine, there must be

Question # 20

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 # 21

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 # 22

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 23

When two objects are rubbed together, their internal energy

Question # 24

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

Question # 25

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

Question # 26

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 27

Absolute zero is considered as that temperature at which:

Question # 28

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

Question # 29

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

Question # 30

The motion of molecules in gases is:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
2 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
3 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
4 Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure
A. A greater than than of B
B. A is equal to that of B
C. A is less than that of B
D. A is twice the pressure of B
5 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
6 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
7 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
8 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
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 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them

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