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

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

Question # 2

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 # 3

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

Question # 4

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 5

In an adiabatic expansion, the temperature of the gas

Question # 6

The unit of thermodynamical scale is

Question # 7

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

Question # 8

In thermodynamics, internal energy is the function of

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

When two objects are rubbed together, their internal energy

Question # 13

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

Question # 14

The volume of universal gas constant R is:

Question # 15

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 16

Internal energy is the sum of all the forms of

Question # 17

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 18

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

Question # 19

The number of translation degress of freedom for a diatomic gas is

Question # 20

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

Question # 21

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

Question # 22

Brownian motion increases due to

Question # 23

The relationship between Boltzmann constant k with R and NAis given as:

Question # 24

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

Question # 25

At O° K which of the following properties of a gas will be zero?

Question # 26

Rice takes longest to cook

Question # 27

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

Question # 28

Adiabatic change occurs when the gas

Question # 29

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

Question # 30

One kilogram of different substances contain

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
2 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
3 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
4 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
5 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
6 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
7 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
8 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
9 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
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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