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 curve representing an isothermal process is called

Question # 2

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

Question # 3

The basis to define a temperature scale that is independent of material properties is provided by

Question # 4

Efficiency of carnot engine is independent of the

Question # 5

Melting point of ice

Question # 6

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 # 7

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

Question # 8

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

Question # 9

The ideal gas law is

Question # 10

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

Question # 11

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

Question # 12

In an ideal gas, the molecules have:

Question # 13

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

Question # 14

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

Question # 15

At constant volume temperature is increased. Then

Question # 16

In the theory of dimensional analysis, heat may be properly represented by:

Question # 17

The absolute temperature of the tripple point of water is

Question # 18

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 19

Energy gas behaves like an ideal gast at

Question # 20

When heat is removed from the system

Question # 21

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 22

The absolute temperature for an ideal gas is

Question # 23

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

Question # 24

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

Question # 25

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 26

The concept of entropy was introduced into the study of thermodynamics in

Question # 27

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

Question # 28

Maximum density of H2O is at the temperature

Question # 29

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

Question # 30

Pressure may be define as _______ per second per unit area:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
2 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them
3 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
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 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
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
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 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
8 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
9 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
10 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion

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