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

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

Question # 2

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

Question # 3

Which of the following does not have the same units:

Question # 4

If the volume of the gas is to be increased by 4 times, then

Question # 5

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

Question # 6

The value of E0in coulomb's law is:

Question # 7

Melting point of ice

Question # 8

Which of the following is not an assumption of kinetic energy

Question # 9

The curve representing an isothermal process is called

Question # 10

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 # 11

The disorder in the system increases due to the

Question # 12

The second law of thermodynamics is concerned with the circumstances in which

Question # 13

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

Question # 14

Which of the following is not thermo dynamical function?

Question # 15

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

Question # 16

Which quantity is important in stating the entropy of the system

Question # 17

Good absorbers of heat are

Question # 18

In an ideal gas, the molecules have:

Question # 19

Average KE of a gas molecule has:

Question # 20

Triple point of water is

Question # 21

If the distance between two charges is doubled, the force between them will become:

Question # 22

In an adiabatic process the work is done at the expense of the

Question # 23

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

Question # 24

The absolute temperature for an ideal gas is

Question # 25

The volume of universal gas constant R is:

Question # 26

Generally a temperature scale is established by

Question # 27

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 # 28

Efficiency of carnot engine is independent of the

Question # 29

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 # 30

The ideal gas law is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
2 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
3 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
A. 0 J
B. 2 J
C. 5 J
D. 10 J
4 In the reverse process, the working substance passes through the same stages as in the direct process and
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
5 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
6 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
7 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
8 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
9 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%
10 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy

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