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 curve representing an adiabatic process is called

Question # 3

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

Question # 4

Heat travels through vacuum by

Question # 5

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

Question # 6

In a heat engine, heat is supplied by the

Question # 7

Which of the following is not thermo dynamical function?

Question # 8

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

Question # 9

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The bicycle pump provides a good example of

Question # 14

The curve representing an isothermal process is called

Question # 15

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

Question # 16

Which of the following does not have the same units:

Question # 17

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

Question # 18

Boyle's law is applicable in

Question # 19

Real gases strictly obey gas law at:

Question # 20

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

Question # 21

Pressure exerted by a gas is

Question # 22

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 23

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

Question # 24

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 25

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 26

First law of thermodynamic is special case of

Question # 27

Average KE of a gas molecule has:

Question # 28

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

Question # 29

Which quantity is important in stating the entropy of the system

Question # 30

Truth of kinetic energy is confirmed by:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
2 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
3 The behaviour of gases is well accounted by the kinetic theory based on
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them
4 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
5 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
6 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
7 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
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 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
10 Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9

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