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

Question # 2

Rate of diffusion is

Question # 3

If an amount of heat enters the system it could

Question # 4

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

Question # 5

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 6

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

Question # 7

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 # 8

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 9

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

Question # 10

The disorder in the system increases due to the

Question # 11

A heat engine is that which converts

Question # 12

Which quantity is important in stating the entropy of the system

Question # 13

Brownian motion increases due to

Question # 14

At constant volume temperature is increased. Then

Question # 15

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 16

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 17

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

Question # 18

Triple point of water is

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

No spark plug is needed in

Question # 23

Absolute zero is considered as that temperature at which:

Question # 24

We can express the work in term of

Question # 25

In the formula P = N0KT, N0denotes:

Question # 26

At O° K which of the following properties of a gas will be zero?

Question # 27

First law of thermodynamics is consequence of conservation of

Question # 28

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

Question # 29

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
2 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
3 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
4 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
5 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
6 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
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 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
9 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
10 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy

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