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 Boltzman constant has the value

Question # 2

In case of an ideal gas, the P.E associated with its molecule is

Question # 3

The example of irreversible process is

Question # 4

Which of the following is a state variable

Question # 5

Triple point of water is

Question # 6

Rice takes longest to cook

Question # 7

An isochoric process is one which take place at

Question # 8

Hotness and coldness of an object is represented in terms:

Question # 9

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

Question # 10

The nature of thermal radiation is similar to:

Question # 11

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 12

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

Question # 13

The internal energy of an ideal gas system is generally the

Question # 14

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 15

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

Question # 16

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

Question # 17

First law of thermodynamics is consequence of conservation of

Question # 18

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

Question # 19

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 20

The disorder in the system increases due to the

Question # 21

The volume of universal gas constant R is:

Question # 22

The bicycle pump provides a good example of

Question # 23

When two objects are rubbed together, their internal energy

Question # 24

On colliding in a closed container, the gas molecules

Question # 25

A carnot cycle consists of

Question # 26

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 27

Heat travels through vacuum by

Question # 28

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

Question # 29

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 30

A heat engine is that which converts

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
2 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
3 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
4 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
5 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
6 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
7 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
8 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
9 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
10 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them

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