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

Carnot heat engine only used

Question # 2

If an amount of heat enters the system it could

Question # 3

The disorder in the system increases due to the

Question # 4

The ideal gas law is

Question # 5

Which of the following does not have the same units:

Question # 6

Good absorbers of heat are

Question # 7

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 8

First law of thermodynamic is special case of

Question # 9

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

Question # 10

Energy gas behaves like an ideal gast at

Question # 11

Hotness and coldness of an object is represented in terms:

Question # 12

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 13

Rate of diffusion is

Question # 14

The example of irreversible process is

Question # 15

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

Question # 16

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 # 17

Absolute temperature can be calculated by

Question # 18

In an adiabatic expansion, the temperature of the gas

Question # 19

A diatomic gas molecule has

Question # 20

The internal energy of an ideal gas system is generally the

Question # 21

Brownian motion increases due to

Question # 22

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 23

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 # 24

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

Question # 25

Melting point of ice

Question # 26

The temperature scale approved in SI units is:

Question # 27

The internal energy of a system does not depend upon the

Question # 28

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

Question # 29

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

Question # 30

Heat travels through vacuum by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
2 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
3 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
4 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
5 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
6 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
7 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
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 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
10 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them

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