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

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

Question # 3

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

Question # 4

Gas constant per molecule is called:

Question # 5

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

Question # 6

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 7

An isochoric process is one which take place at

Question # 8

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

Question # 9

Which of the following does not have the same units:

Question # 10

The curve representing an adiabatic process is called

Question # 11

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 12

The unit of thermodynamical scale is

Question # 13

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

Question # 14

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

Question # 15

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 # 16

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

Question # 17

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

Question # 18

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 19

We cannot utilize the heat contents of oceans and atmosphere because

Question # 20

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

Question # 21

The example of irreversible process is

Question # 22

The ideal gas law is

Question # 23

At constant volume temperature is increased. Then

Question # 24

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

Question # 25

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

Question # 26

The bicycle pump provides a good example of

Question # 27

A diatomic gas molecule has

Question # 28

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

Question # 29

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

Question # 30

A carnot cycle consists of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
2 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
3 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
4 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
5 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
6 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
7 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
8 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
9 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
10 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically

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