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

Pressure of a gas at constant volume is proportion to

Question # 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

Question # 3

Which of the following does not have the same units:

Question # 4

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

Question # 5

Generally a temperature scale is established by

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

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

Question # 8

We cannot utilize the heat contents of oceans and atmosphere because

Question # 9

A process is a reversible process, if the entropy of the system

Question # 10

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 11

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 12

The volume of universal gas constant R is:

Question # 13

Which of the following is not an example of adiabatic process

Question # 14

The second law of thermodynamics is concerned with the circumstances in which

Question # 15

The example of irreversible process is

Question # 16

For the working of a heat engine, there must be

Question # 17

The unit of thermodynamical scale is

Question # 18

While deriving the equation for pressure of a gas we consider the

Question # 19

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

Question # 20

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 # 21

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

Question # 22

The internal energy of a system does not depend upon the

Question # 23

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

Question # 24

Triple point of water is

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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 # 29

The ideal gas law is

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
2 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
3 The volume of universal gas constant R is:
A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
4 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
A. 0°C
B. 10°C
C. 17°C
D. 20°C
5 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
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 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
8 The process which is carried out at constant temperature is known as
A. adiabatic process
B. isothermal process
C. isochoric process
D. none of them
9 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
10 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them

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