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 internal energy of a system does not depend upon the

Question # 2

Triple point of water is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Internal energy is the sum of all the forms of

Question # 7

Which of the following is a state variable

Question # 8

Rate of diffusion is

Question # 9

A reversible cycle is the one in which

Question # 10

The number of translation degress of freedom for a diatomic gas is

Question # 11

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 # 12

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 # 13

Adiabatic change occurs when the gas

Question # 14

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 15

Absolute temperature can be calculated by

Question # 16

The Boltzman constant has the value

Question # 17

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 18

The concept of entropy was introduced into the study of thermodynamics in

Question # 19

The pressure exerted by the gas is

Question # 20

A diatomic gas molecule has

Question # 21

If an amount of heat enters the system it could

Question # 22

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

Question # 23

In an ideal gas, the molecules have:

Question # 24

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 25

On colliding in a closed container, the gas molecules

Question # 26

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

Question # 27

The internal energy of an ideal gas system is generally the

Question # 28

Heat travels through vacuum by

Question # 29

Good absorbers of heat are

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
2 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
3 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
4 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
5 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
6 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
7 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
8 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
9 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
D. None of these
10 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16

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