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

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 # 2

One kilogram of different substances contain

Question # 3

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

Question # 4

Carnot heat engine only used

Question # 5

If the volume of the gas is to be increased by 4 times, then

Question # 6

Which quantity is important in stating the entropy of the system

Question # 7

The rate of change of momentum of a molecule is equal to:

Question # 8

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

Question # 9

In an ideal gas, the molecules have:

Question # 10

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

Question # 11

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 12

Average KE of a gas molecule has:

Question # 13

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

Question # 14

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

Question # 15

Absolute temperature can be calculated by

Question # 16

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

Question # 17

According to the second law, which is must to produce work

Question # 18

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

Question # 19

The internal energy of an ideal gas system is generally the

Question # 20

The temperature of gas is produced by

Question # 21

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 22

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

Question # 23

The temperature scale approved in SI units is:

Question # 24

The pressure exerted by the gas is

Question # 25

Which of the following is a state variable

Question # 26

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 27

At absolute temperature, the kinetic energy of the molecules

Question # 28

A diatomic gas molecule has

Question # 29

First law of thermodynamic is special case of

Question # 30

When heat is removed from the system

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
2 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
3 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
4 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
5 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
6 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
7 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
8 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
9 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
10 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%

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