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

Average KE of a gas molecule has:

Question # 2

During the whole carnot cycle

Question # 3

The unit of thermodynamical scale is

Question # 4

The nature of thermal radiation is similar to:

Question # 5

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 6

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

Question # 7

Heat travels through vacuum by

Question # 8

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

Question # 9

Hotness and coldness of an object is represented in terms:

Question # 10

A diatomic gas molecule has

Question # 11

The internal energy of an ideal gas system is generally the

Question # 12

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

Question # 13

Adiabatic change occurs when the gas

Question # 14

A real gas can be approximated to an ideal gas at

Question # 15

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

Question # 16

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

Question # 17

The internal energy of a system does not depend upon the

Question # 18

Which of the following is a state variable

Question # 19

At absolute temperature, the kinetic energy of the molecules

Question # 20

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

Question # 21

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

Question # 22

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 23

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 24

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

Question # 25

Rice takes longest to cook

Question # 26

A reversible cycle is the one in which

Question # 27

First law of thermodynamics is consequence of conservation of

Question # 28

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

Question # 29

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

Question # 30

The temperature of gas is produced by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
2 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
3 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
4 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
5 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
6
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
7 First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them
8 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
9 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
10 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

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