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

Real gases strictly obey gas law at:

Question # 2

Pressure exerted by a gas is

Question # 3

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 4

The disorder in the system increases due to the

Question # 5

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 6

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 7

At absolute temperature, the kinetic energy of the molecules

Question # 8

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

Question # 9

A carnot cycle consists of

Question # 10

Rate of diffusion is

Question # 11

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 12

In an adiabatic expansion, the temperature of the gas

Question # 13

Triple point of water is

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

The second law of thermodynamics is concerned with the circumstances in which

Question # 16

Absolute zero is considered as that temperature at which:

Question # 17

The value of E0in coulomb's law is:

Question # 18

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 19

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 # 20

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 # 21

The internal energy of a system does not depend upon the

Question # 22

In case of an ideal gas, the P.E associated with its molecule is

Question # 23

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

Question # 24

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

Question # 25

When heat is removed from the system

Question # 26

In all natural processes where heat flows from one system to another, there is always a net

Question # 27

Which of the following is not an assumption of kinetic energy

Question # 28

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

Question # 29

Sadi carnot described an ideal heat engine in

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
2 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
3 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
4 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
5 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
6 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
7 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
8 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
9 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
10 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four

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