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

The temperature of gas is produced by

Question # 2

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 3

Efficiency of carnot engine is independent of the

Question # 4

The value of E0in coulomb's law is:

Question # 5

A carnot cycle consists of

Question # 6

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 7

The example of irreversible process is

Question # 8

The work done on the system by the environment is considered as

Question # 9

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 10

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

Question # 11

In all natural processes where heat flows from one system to another, there is always a net

Question # 12

According to kinetic theory of gases, molecules of a gas behave like

Question # 13

The work done by the system on its environment is considered as

Question # 14

The curve representing an adiabatic process is called

Question # 15

Maximum density of H2O is at the temperature

Question # 16

The number of translation degress of freedom for a diatomic gas is

Question # 17

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 18

The basis to define a temperature scale that is independent of material properties is provided by

Question # 19

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

Question # 20

Which quantity is important in stating the entropy of the system

Question # 21

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 22

In a heat engine, heat is supplied by the

Question # 23

In an adiabatic expansion, the temperature of the gas

Question # 24

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

Question # 25

Average KE of a gas molecule has:

Question # 26

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

Question # 27

Carnot heat engine only used

Question # 28

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

Question # 29

Pressure of a gas at constant volume is proportion to

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
2 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
3 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
4 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
5 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
6 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
7 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
8 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
9 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
10 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically

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