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 process in which no heat enters or leaves the system is called

Question # 2

The efficiency of diesel engine is

Question # 3

Melting point of ice

Question # 4

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

Question # 5

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

Question # 6

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 # 7

One mole of any substance contain

Question # 8

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 9

Rice takes longest to cook

Question # 10

First law of thermodynamic is special case of

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

A reversible cycle is the one in which

Question # 15

First law of thermodynamics is consequence of conservation of

Question # 16

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

Question # 17

The earliest heat engine was

Question # 18

The curve representing an isothermal process is called

Question # 19

Pressure may be define as _______ per second per unit area:

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

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

Carnot heat engine only used

Question # 26

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 27

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 28

A diatomic gas molecule has

Question # 29

Average KE of a gas molecule has:

Question # 30

No spark plug is needed in

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
2 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
3 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
4 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
5 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
6 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
7 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
8 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
9 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
10 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these

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