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

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

Question # 2

The absolute temperature of the tripple point of water is

Question # 3

The bicycle pump provides a good example of

Question # 4

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 5

The curve representing an adiabatic process is called

Question # 6

Efficiency of carnot engine is independent of the

Question # 7

Maximum density of H2O is at the temperature

Question # 8

If the formula PV = nRT, n denotes:

Question # 9

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 10

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 11

A carnot cycle consists of

Question # 12

A process is a reversible process, if the entropy of the system

Question # 13

The example of irreversible process is

Question # 14

At absolute temperature, the kinetic energy of the molecules

Question # 15

Average KE of a gas molecule has:

Question # 16

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

Question # 17

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

Question # 18

Good absorbers of heat are

Question # 19

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 20

The absolute temperature for an ideal gas is

Question # 21

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

Question # 22

The percentage of available heat energy converted into work by a diesel engine is roughly

Question # 23

The disorder in the system increases due to the

Question # 24

In a heat engine, heat is supplied by the

Question # 25

The pressure exerted by the gas is

Question # 26

Melting point of ice

Question # 27

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

Question # 28

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

Question # 29

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 # 30

No spark plug is needed in

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
2 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
3 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
4 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
5 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
6 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
7 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
8 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
9 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
10 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these

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