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 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 # 2

If an amount of heat enters the system it could

Question # 3

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

Question # 4

When heat is removed from the system

Question # 5

The pressure exerted by the gas is

Question # 6

Good absorbers of heat are

Question # 7

Pressure exerted by a gas is

Question # 8

Absolute temperature can be calculated by

Question # 9

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

Question # 10

Which quantity is important in stating the entropy of the system

Question # 11

Gas constant per molecule is called:

Question # 12

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

Question # 13

If the distance between two charges is doubled, the force between them will become:

Question # 14

Which of the following is a state variable

Question # 15

Triple point of water is

Question # 16

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

Question # 17

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

Question # 18

Maximum density of H2O is at the temperature

Question # 19

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 20

Carnot heat engine only used

Question # 21

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 22

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

Question # 23

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

Question # 24

A reversible cycle is the one in which

Question # 25

A succession of events which bring the system back to its initial condition is called

Question # 26

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

Question # 27

The ideal gas law is

Question # 28

On colliding in a closed container, the gas molecules

Question # 29

Heat travels through vacuum by

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 For the working of a heat engine, there must be
A. a source of heat at high temperature
B. a sink at low temperature
C. both of them
D. none of them
3 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
4 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
5 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
6 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
7 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
8 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
9 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
10 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them

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