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

Brownian motion increases due to

Question # 2

Average KE of a gas molecule has:

Question # 3

If an amount of heat enters the system it could

Question # 4

In the formula P = N0KT, N0denotes:

Question # 5

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 6

The efficiency of diesel engine is

Question # 7

If the formula PV = nRT, n denotes:

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Adiabatic change occurs when the gas

Question # 12

Heat travels through vacuum by

Question # 13

Which of the following is a state variable

Question # 14

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 15

If the distance between two charges is doubled, the force between them will become:

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

For the working of a heat engine, there must be

Question # 24

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

Question # 25

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

Question # 26

First law of thermodynamics is consequence of conservation of

Question # 27

Maximum density of H2O is at the temperature

Question # 28

When two objects are rubbed together, their internal energy

Question # 29

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

Question # 30

An isochoric process is one which take place at

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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 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none 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 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
5 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
6 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
7 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
8 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
9 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
10 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

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