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

Question # 2

The Boltzman constant has the value

Question # 3

At constant volume temperature is increased. Then

Question # 4

The example of reversible process is

Question # 5

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

Question # 6

When heat is added into the system then change in entropy is

Question # 7

The disorder in the system increases due to the

Question # 8

For the working of a heat engine, there must be

Question # 9

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

Question # 10

The absolute temperature of the tripple point of water is

Question # 11

First law of thermodynamic is special case of

Question # 12

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

Question # 13

Internal energy is the sum of all the forms of

Question # 14

Which quantity is important in stating the entropy of the system

Question # 15

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

Question # 16

The state in which ice, water and vapour coexists in equilibrium is called

Question # 17

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

Question # 18

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 19

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

Question # 20

When heat is removed from the system

Question # 21

In a heat engine, heat is supplied by the

Question # 22

The ideal gas law is

Question # 23

Energy gas behaves like an ideal gast at

Question # 24

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

Question # 25

Absolute temperature can be calculated by

Question # 26

Average KE of a gas molecule has:

Question # 27

One kilogram of different substances contain

Question # 28

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

Question # 29

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

Question # 30

Which of the following is not an example of adiabatic process

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
2 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
3 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
4 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
5 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
6 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
7 Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
8 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
9 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
A. 0°C
B. 10°C
C. 17°C
D. 20°C
10 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>

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