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

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

Question # 3

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 4

The disorder in the system increases due to the

Question # 5

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

Question # 6

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 # 7

Triple point of water is

Question # 8

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 9

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 10

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

Question # 11

Pressure of a gas at constant volume is proportion to

Question # 12

The ideal gas law is

Question # 13

Pressure exerted by a gas is

Question # 14

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

Question # 15

Which of the following is not an assumption of kinetic energy

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

A process in which no heat enters or leaves the system is called

Question # 18

Efficiency of carnot engine is independent of the

Question # 19

In an ideal gas, the molecules have:

Question # 20

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 21

The work done by the system on its environment is considered as

Question # 22

At constant volume temperature is increased. Then

Question # 23

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

Question # 24

The state in which ice, water and vapour coexists in equilibrium is called

Question # 25

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

Question # 26

The example of reversible process is

Question # 27

In the formula P = N0KT, N0denotes:

Question # 28

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 29

We cannot utilize the heat contents of oceans and atmosphere because

Question # 30

The earliest heat engine was

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
2 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
3 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
4 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
5 If water in a closed bottle is taken up to the moon and opened, the water gets
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
6 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
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 internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
9 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
10 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%

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