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

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

Question # 2

Which of the following is not thermo dynamical function?

Question # 3

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

Question # 4

The curve representing an isothermal process is called

Question # 5

The motion of molecules in gases is:

Question # 6

The value of E0in coulomb's law is:

Question # 7

The nature of thermal radiation is similar to:

Question # 8

The absolute temperature for an ideal gas is

Question # 9

Absolute temperature can be calculated by

Question # 10

When two objects are rubbed together, their internal energy

Question # 11

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

Question # 12

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

Question # 13

A process is a reversible process, if the entropy of the system

Question # 14

If the volume of the gas is to be increased by 4 times, then

Question # 15

In the theory of dimensional analysis, heat may be properly represented by:

Question # 16

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

Question # 17

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

Question # 18

When heat is removed from the system

Question # 19

When heat is added into the system then change in entropy is

Question # 20

The volume of universal gas constant R is:

Question # 21

First law of thermodynamics is consequence of conservation of

Question # 22

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

Question # 23

The second law of thermodynamics is concerned with the circumstances in which

Question # 24

Carnot heat engine only used

Question # 25

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 26

Rice takes longest to cook

Question # 27

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

Question # 28

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

Question # 29

An isochoric process is one which take place at

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
2 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
3 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
4 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
5 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
6 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
7 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
8 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
9 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
10 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them

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