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

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 # 2

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

Question # 3

Which of the following is not thermo dynamical function?

Question # 4

An isochoric process is one which take place at

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The motion of molecules in gases is:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

In the formula P = N0KT, N0denotes:

Question # 13

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

Question # 14

Real gases strictly obey gas law at:

Question # 15

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

Question # 16

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

Question # 17

Average KE of a gas molecule has:

Question # 18

Absolute temperature can be calculated by

Question # 19

The behaviour of gases is well accounted by the kinetic theory based on

Question # 20

In an adiabatic expansion, the temperature of the gas

Question # 21

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

Question # 22

A heat engine is that which converts

Question # 23

A carnot cycle consists of

Question # 24

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 25

The rate of change of momentum of a molecule is equal to:

Question # 26

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 27

The example of irreversible process is

Question # 28

When two objects are rubbed together, their internal energy

Question # 29

During the whole carnot cycle

Question # 30

The value of E0in coulomb's law is:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
2 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
3 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
4 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
5 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
6 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
7 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
8 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
9 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
10 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
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law

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