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 percentage of available heat energy converted into work by a diesel engine is roughly

Question # 2

One mole of any substance contain

Question # 3

Absolute zero is considered as that temperature at which:

Question # 4

Good absorbers of heat are

Question # 5

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 6

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

Question # 7

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

Question # 8

The internal energy of an ideal gas system is generally the

Question # 9

Which of the following is not thermo dynamical function?

Question # 10

For the working of a heat engine, there must be

Question # 11

Which of the following does not have the same units:

Question # 12

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

Question # 13

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

Question # 14

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 15

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

Question # 16

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 17

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

Question # 18

A reversible cycle is the one in which

Question # 19

A carnot cycle consists of

Question # 20

Internal energy is the sum of all the forms of

Question # 21

Brownian motion increases due to

Question # 22

In a heat engine, heat is supplied by the

Question # 23

The curve representing an adiabatic process is called

Question # 24

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 25

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

Question # 26

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

Question # 27

Rice takes longest to cook

Question # 28

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

Question # 29

A real gas can be approximated to an ideal gas at

Question # 30

Melting point of ice

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
2 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
3 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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
4 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
5 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
6 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
7 Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
8 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
9 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
10 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids

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