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

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

Question # 2

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 3

Pressure of a gas at constant volume is proportion to

Question # 4

The absolute temperature of the tripple point of water is

Question # 5

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 6

Good absorbers of heat are

Question # 7

In an adiabatic expansion, the temperature of the gas

Question # 8

In thermodynamics, internal energy is the function of

Question # 9

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

Question # 10

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

Question # 11

The volume of universal gas constant R is:

Question # 12

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

Question # 13

Electromagnetic waves emitted by hot bodies are called:

Question # 14

At constant volume temperature is increased. Then

Question # 15

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

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 behaviour of gases is well accounted by the kinetic theory based on

Question # 18

The Boltzman constant has the value

Question # 19

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

Question # 20

In the formula P = N0KT, N0denotes:

Question # 21

If the formula PV = nRT, n denotes:

Question # 22

The earliest heat engine was

Question # 23

The product of the pressure and volume of an ideal gas is

Question # 24

Internal energy is the sum of all the forms of

Question # 25

The example of irreversible process is

Question # 26

Boyle's law is applicable in

Question # 27

When heat is removed from the system

Question # 28

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 # 29

Generally a temperature scale is established by

Question # 30

At absolute temperature, the kinetic energy of the molecules

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ECAT Class Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
2 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
3 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
4 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
5 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one 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 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:
A. Force
B. Density
C. Work done
D. Pressure
8 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
9 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
10 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these

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