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

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 2

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

Question # 3

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

Question # 4

The Boltzman constant has the value

Question # 5

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

Question # 6

According to the second law, which is must to produce work

Question # 7

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

Question # 8

The disorder in the system increases due to the

Question # 9

Which of the following is not an assumption of kinetic energy

Question # 10

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

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

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

Question # 13

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 14

A heat engine is that which converts

Question # 15

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

Question # 16

If an amount of heat enters the system it could

Question # 17

Generally a temperature scale is established by

Question # 18

For the working of a heat engine, there must be

Question # 19

Good absorbers of heat are

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 24

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

Question # 25

We cannot utilize the heat contents of oceans and atmosphere because

Question # 26

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 27

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 # 28

If the formula PV = nRT, n denotes:

Question # 29

We can express the work in term of

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
3 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
4 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
5 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
6 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
7 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
8 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
9 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
10 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2

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