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

We can express the work in term of

Question # 2

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 3

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 4

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

Question # 5

In an adiabatic process the work is done at the expense of the

Question # 6

Average KE of a gas molecule has:

Question # 7

The pressure exerted by the gas is

Question # 8

Which of the following is a state variable

Question # 9

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

Question # 10

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

Question # 11

The value of E0in coulomb's law is:

Question # 12

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

Question # 13

Internal energy is the sum of all the forms of

Question # 14

Pressure may be define as _______ per second per unit area:

Question # 15

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

Question # 16

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

Question # 17

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 # 18

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

Question # 19

Good absorbers of heat are

Question # 20

Which of the following does not have the same units:

Question # 21

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 22

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

Question # 23

First law of thermodynamic is special case of

Question # 24

A real gas can be approximated to an ideal gas at

Question # 25

Electromagnetic waves emitted by hot bodies are called:

Question # 26

Maximum density of H2O is at the temperature

Question # 27

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 28

An isochoric process is one which take place at

Question # 29

For the working of a heat engine, there must be

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
3 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
4 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
5 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
6 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
7 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
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
8 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
9 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
10 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness

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