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 O° K which of the following properties of a gas will be zero?

Question # 2

The temperature scale approved in SI units is:

Question # 3

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

Question # 4

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

Question # 5

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 6

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

Question # 7

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

Question # 8

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The absolute temperature of the tripple point of water is

Question # 14

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

Question # 15

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

Question # 16

Average KE of a gas molecule has:

Question # 17

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 18

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

Question # 19

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 20

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

Question # 21

According to kinetic theory of gases, molecules of a gas behave like

Question # 22

Rate of diffusion is

Question # 23

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

Question # 24

A reversible cycle is the one in which

Question # 25

Carnot heat engine only used

Question # 26

When two objects come to common temperature, the body is said to be in:

Question # 27

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

Question # 28

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 29

The example of reversible process is

Question # 30

During the whole carnot cycle

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
2 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
3 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
4 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
5 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
6 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
7 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
8 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
9 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
10 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them

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