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

A heat engine is that which converts

Question # 2

The example of irreversible process is

Question # 3

The temperature scale approved in SI units is:

Question # 4

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

Question # 5

The curve representing an isothermal process is called

Question # 6

The ideal gas law is

Question # 7

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 8

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

Question # 9

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 10

Real gases strictly obey gas law at:

Question # 11

Brownian motion increases due to

Question # 12

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

Question # 13

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

Question # 14

A real gas can be approximated to an ideal gas at

Question # 15

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

Question # 16

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 # 17

Which of the following is not an example of adiabatic process

Question # 18

Which of the following does not have the same units:

Question # 19

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 20

When two objects are rubbed together, their internal energy

Question # 21

The temperature of gas is produced by

Question # 22

In the formula P = N0KT, N0denotes:

Question # 23

The behaviour of gases is well accounted by the kinetic theory based on

Question # 24

The motion of molecules in gases is:

Question # 25

Rice takes longest to cook

Question # 26

The unit of thermodynamical scale is

Question # 27

A carnot cycle consists of

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
2 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
3 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
4 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
5 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
6 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
7 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
8 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
9 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
10 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

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