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 unit of thermodynamical scale is

Question # 2

The bicycle pump provides a good example of

Question # 3

Average KE of a gas molecule has:

Question # 4

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

Question # 5

Hotness and coldness of an object is represented in terms:

Question # 6

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 7

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

Question # 8

When heat is removed from the system

Question # 9

Electromagnetic waves emitted by hot bodies are called:

Question # 10

For the working of a heat engine, there must be

Question # 11

On colliding in a closed container, the gas molecules

Question # 12

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

Question # 13

One mole of any substance contain

Question # 14

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

Question # 15

The absolute temperature of the tripple point of water is

Question # 16

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 17

Heat travels through vacuum by

Question # 18

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

Question # 19

Real gases strictly obey gas law at:

Question # 20

The curve representing an adiabatic process is called

Question # 21

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 22

The disorder in the system increases due to the

Question # 23

We cannot utilize the heat contents of oceans and atmosphere because

Question # 24

The efficiency of diesel engine is

Question # 25

Which quantity is important in stating the entropy of the system

Question # 26

Which of the following is not thermo dynamical function?

Question # 27

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

Question # 28

Efficiency of carnot engine is independent of the

Question # 29

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

Question # 30

Absolute temperature can be calculated by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
2 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
3 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
4 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
5 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
6 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
7 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
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 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
10 First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them

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