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

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

Question # 2

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

Question # 3

If the formula PV = nRT, n denotes:

Question # 4

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

Question # 5

The disorder in the system increases due to the

Question # 6

Boyle's law is applicable in

Question # 7

The example of irreversible process is

Question # 8

Maximum density of H2O is at the temperature

Question # 9

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 10

An isochoric process is one which take place at

Question # 11

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 12

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 13

Melting point of ice

Question # 14

Triple point of water is

Question # 15

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

Question # 16

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 # 17

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 18

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 19

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

Question # 20

For the working of a heat engine, there must be

Question # 21

If an amount of heat enters the system it could

Question # 22

First law of thermodynamics is consequence of conservation of

Question # 23

Electromagnetic waves emitted by hot bodies are called:

Question # 24

Generally a temperature scale is established by

Question # 25

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

Question # 26

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 27

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

Question # 28

Efficiency of carnot engine is independent of the

Question # 29

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

Question # 30

A process in which no heat enters or leaves the system is called

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
2 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
3 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
4 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
5 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
6 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
7 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
8 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
9 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
10 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

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