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 number of translation degress of freedom for a diatomic gas is

Question # 2

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

Question # 3

If the formula PV = nRT, n denotes:

Question # 4

If an amount of heat enters the system it could

Question # 5

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 # 6

In the theory of dimensional analysis, heat may be properly represented by:

Question # 7

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 8

The nature of thermal radiation is similar to:

Question # 9

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 10

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 11

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

Question # 12

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 13

During the whole carnot cycle

Question # 14

Real gases strictly obey gas law at:

Question # 15

The volume of universal gas constant R is:

Question # 16

In the study of thermodynamics, which gas is considered as the working substance

Question # 17

The curve representing an isothermal process is called

Question # 18

If the distance between two charges is doubled, the force between them will become:

Question # 19

Which of the following is not an example of adiabatic process

Question # 20

First law of thermodynamic is special case of

Question # 21

Hotness and coldness of an object is represented in terms:

Question # 22

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 23

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 24

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

Question # 25

The value of E0in coulomb's law is:

Question # 26

The process which is carried out at constant temperature is known as

Question # 27

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

Question # 28

Internal energy is the sum of all the forms of

Question # 29

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

Question # 30

The ideal gas law is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
2 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
3 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
4 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
5 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
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
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
8 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
9 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
10 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them

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