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 coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 2

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 3

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

Question # 4

The state in which ice, water and vapour coexists in equilibrium is called

Question # 5

Which quantity is important in stating the entropy of the system

Question # 6

Brownian motion increases due to

Question # 7

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

Question # 8

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

Question # 9

The absolute temperature of the tripple point of water is

Question # 10

Adiabatic change occurs when the gas

Question # 11

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 12

The disorder in the system increases due to the

Question # 13

The motion of molecules in gases is:

Question # 14

When heat is removed from the system

Question # 15

Heat travels through vacuum by

Question # 16

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

Question # 17

The temperature of gas is produced by

Question # 18

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

Question # 19

The concept of entropy was introduced into the study of thermodynamics in

Question # 20

The pressure exerted by the gas is

Question # 21

Average KE of a gas molecule has:

Question # 22

The bicycle pump provides a good example of

Question # 23

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

Question # 24

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 25

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

Question # 26

The ideal gas law is

Question # 27

First law of thermodynamic is special case of

Question # 28

The example of irreversible process is

Question # 29

Sadi carnot described an ideal heat engine in

Question # 30

At constant volume temperature is increased. Then

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
2 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
3 For the working of a heat engine, there must be
A. a source of heat at high temperature
B. a sink at low temperature
C. both of them
D. none of them
4 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
5 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
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
6 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
7 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
8 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
9 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
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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