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 volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 2

At constant volume temperature is increased. Then

Question # 3

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

Question # 4

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

Question # 5

The behaviour of gases is well accounted by the kinetic theory based on

Question # 6

The volume of universal gas constant R is:

Question # 7

In case of an ideal gas, the P.E associated with its molecule is

Question # 8

The only significant motion possessed by the mono-atomic gas represented is:

Question # 9

The internal energy of a system does not depend upon the

Question # 10

In thermodynamics, internal energy is the function of

Question # 11

Hotness and coldness of an object is represented in terms:

Question # 12

Average KE of a gas molecule has:

Question # 13

Gas constant per molecule is called:

Question # 14

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 # 15

Which of the following is a state variable

Question # 16

Which of the following is not thermo dynamical function?

Question # 17

Which quantity is important in stating the entropy of the system

Question # 18

The earliest heat engine was

Question # 19

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

Question # 20

The example of irreversible process is

Question # 21

When heat is removed from the system

Question # 22

Good absorbers of heat are

Question # 23

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 24

The absolute temperature of the tripple point of water is

Question # 25

The internal energy of an ideal gas system is generally the

Question # 26

The number of translation degress of freedom for a diatomic gas is

Question # 27

Which of the following is not an assumption of kinetic energy

Question # 28

The bicycle pump provides a good example of

Question # 29

If an amount of heat enters the system it could

Question # 30

The relationship between Boltzmann constant k with R and NAis given as:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
2 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
3 If an amount of heat enters the system it could
A. decrease the internal energy
B. not change the internal energy
C. increase the internal energy
D. none of them
4 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
5 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
6 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%
7 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
8 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
9 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
10 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth

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