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

Absolute temperature can be calculated by

Question # 2

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 3

Absolute zero is considered as that temperature at which:

Question # 4

Boyle's law is applicable in

Question # 5

When heat is removed from the system

Question # 6

At absolute temperature, the kinetic energy of the molecules

Question # 7

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

Question # 8

The absolute temperature of the tripple point of water is

Question # 9

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 # 10

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

Question # 11

Truth of kinetic energy is confirmed by:

Question # 12

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 13

We can express the work in term of

Question # 14

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 15

Which of the following is not an example of adiabatic process

Question # 16

Average KE of a gas molecule has:

Question # 17

Which quantity is important in stating the entropy of the system

Question # 18

According to the second law, which is must to produce work

Question # 19

An isochoric process is one which take place at

Question # 20

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

Question # 21

First law of thermodynamic is special case of

Question # 22

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 23

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 # 24

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

Question # 25

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 26

Electromagnetic waves emitted by hot bodies are called:

Question # 27

The ideal gas law is

Question # 28

We cannot utilize the heat contents of oceans and atmosphere because

Question # 29

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

Question # 30

In the reverse process, the working substance passes through the same stages as in the direct process and

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
2 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
3 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
4 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
5 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them
6 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
7 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
8 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
9 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
10 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

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