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 curve representing an isothermal process is called

Question # 2

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

Question # 3

Hotness and coldness of an object is represented in terms:

Question # 4

On colliding in a closed container, the gas molecules

Question # 5

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

Question # 6

A process in which no heat enters or leaves the system is called

Question # 7

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

Question # 8

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

Question # 9

First law of thermodynamic is special case of

Question # 10

Absolute temperature can be calculated by

Question # 11

Real gases strictly obey gas law at:

Question # 12

A heat engine is that which converts

Question # 13

Adiabatic change occurs when the gas

Question # 14

At constant volume temperature is increased. Then

Question # 15

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 16

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 # 17

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

Energy gas behaves like an ideal gast at

Question # 23

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

Question # 24

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

Question # 25

Average KE of a gas molecule has:

Question # 26

We can express the work in term of

Question # 27

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

Question # 28

A process is a reversible process, if the entropy of the system

Question # 29

Pressure of a gas at constant volume is proportion to

Question # 30

If the volume of the gas is to be increased by 4 times, then

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
2 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
3 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
4 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
5 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
6 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
7 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
8 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
9 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
10 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them

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