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

00:00
Question # 1

The volume of universal gas constant R is:

Question # 2

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 3

Rice takes longest to cook

Question # 4

The efficiency of diesel engine is

Question # 5

The curve representing an isothermal process is called

Question # 6

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

Question # 7

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

Question # 8

The ideal gas law is

Question # 9

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

Question # 10

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

Question # 11

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 12

The motion of molecules in gases is:

Question # 13

A heat engine is that which converts

Question # 14

On colliding in a closed container, the gas molecules

Question # 15

The value of E0in coulomb's law is:

Question # 16

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

Question # 17

The pressure exerted by the gas is

Question # 18

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

Question # 19

In a heat engine, heat is supplied by the

Question # 20

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

Question # 21

Electromagnetic waves emitted by hot bodies are called:

Question # 22

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 23

Which quantity is important in stating the entropy of the system

Question # 24

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 # 25

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

Question # 26

Which of the following does not have the same units:

Question # 27

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 28

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 29

No spark plug is needed in

Question # 30

Energy gas behaves like an ideal gast at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
2 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
3 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
4 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
5 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
6 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
7 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
8 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
9 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
10 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done

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