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

00:00
Question # 1

In the formula P = N0KT, N0denotes:

Question # 2

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

Question # 3

Boyle's law is applicable in

Question # 4

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 5

Average KE of a gas molecule has:

Question # 6

The disorder in the system increases due to the

Question # 7

The pressure exerted by the gas is

Question # 8

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

Question # 9

Internal energy is the sum of all the forms of

Question # 10

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

Question # 11

The temperature of gas is produced by

Question # 12

Pressure of a gas at constant volume is proportion to

Question # 13

Maximum density of H2O is at the temperature

Question # 14

Melting point of ice

Question # 15

A reversible cycle is the one in which

Question # 16

Gas constant per molecule is called:

Question # 17

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 18

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

Question # 19

One mole of any substance contain

Question # 20

A heat engine is that which converts

Question # 21

Rate of diffusion is

Question # 22

First law of thermodynamic is special case of

Question # 23

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

Question # 24

During the whole carnot cycle

Question # 25

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 # 26

The Boltzman constant has the value

Question # 27

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 28

Adiabatic change occurs when the gas

Question # 29

The volume of universal gas constant R is:

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
2 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
3 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
4 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
5 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
6 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
7 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
8 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
9 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
10 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased

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