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 percentage of available heat energy converted into work by a diesel engine is roughly

Question # 2

Energy gas behaves like an ideal gast at

Question # 3

Maximum density of H2O is at the temperature

Question # 4

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

Question # 5

The example of irreversible process is

Question # 6

Carnot heat engine only used

Question # 7

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 8

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 # 9

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 10

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 # 11

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 12

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 13

Absolute temperature can be calculated by

Question # 14

We can express the work in term of

Question # 15

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

Question # 16

The concept of entropy was introduced into the study of thermodynamics in

Question # 17

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

Question # 18

Which of the following does not have the same units:

Question # 19

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

Question # 20

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

Question # 21

Heat travels through vacuum by

Question # 22

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 # 23

One mole of any substance contain

Question # 24

According to kinetic theory of gases, molecules of a gas behave like

Question # 25

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 26

In the formula P = N0KT, N0denotes:

Question # 27

The only significant motion possessed by the mono-atomic gas represented is:

Question # 28

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 29

The value of E0in coulomb's law is:

Question # 30

The temperature of gas is produced by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
4 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:
A. Force
B. Density
C. Work done
D. Pressure
5 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
6 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
7 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
8 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
9 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
10 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these

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