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 example of reversible process is

Question # 2

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 3

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

Question # 4

The disorder in the system increases due to the

Question # 5

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 6

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 7

Which of the following does not have the same units:

Question # 8

While deriving the equation for pressure of a gas we consider the

Question # 9

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

Question # 10

The process which is carried out at constant temperature is known as

Question # 11

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

Question # 12

Average KE of a gas molecule has:

Question # 13

Absolute temperature can be calculated by

Question # 14

In all natural processes where heat flows from one system to another, there is always a net

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Pressure exerted by a gas is

Question # 19

One kilogram of different substances contain

Question # 20

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

Question # 21

Pressure of a gas at constant volume is proportion to

Question # 22

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

Question # 23

In thermodynamics, internal energy is the function of

Question # 24

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 25

A reversible cycle is the one in which

Question # 26

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

Question # 27

A process is a reversible process, if the entropy of the system

Question # 28

The product of the pressure and volume of an ideal gas is

Question # 29

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 # 30

Hotness and coldness of an object is represented in terms:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following is not an example of adiabatic process
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them
2 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
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 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
5 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
6 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
7 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
8 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
9 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
10 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them

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