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 bicycle pump provides a good example of

Question # 2

The example of irreversible process is

Question # 3

The efficiency of diesel engine is

Question # 4

When heat is removed from the system

Question # 5

Internal energy is the sum of all the forms of

Question # 6

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

Question # 7

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

Question # 8

At O° K which of the following properties of a gas will be zero?

Question # 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

Question # 10

The Boltzman constant has the value

Question # 11

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

Question # 12

A reversible cycle is the one in which

Question # 13

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 # 14

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 15

Boyle's law is applicable in

Question # 16

Carnot heat engine only used

Question # 17

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

Question # 18

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

Question # 19

One mole of any substance contain

Question # 20

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 # 21

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

Question # 22

A diatomic gas molecule has

Question # 23

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

Question # 24

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

Question # 25

A process in which no heat enters or leaves the system is called

Question # 26

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 # 27

Rate of diffusion is

Question # 28

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 29

In an ideal gas, the molecules have:

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
2 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
3 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
4 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
D. None of these
5 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
6 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
7 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
8 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
9 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
10 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine

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