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

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

Question # 2

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

Question # 3

Heat travels through vacuum by

Question # 4

The state in which ice, water and vapour coexists in equilibrium is called

Question # 5

No spark plug is needed in

Question # 6

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 7

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

Question # 8

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 # 9

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 10

Electromagnetic waves emitted by hot bodies are called:

Question # 11

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 12

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 13

The earliest heat engine was

Question # 14

Melting point of ice

Question # 15

In the theory of dimensional analysis, heat may be properly represented by:

Question # 16

An isochoric process is one which take place at

Question # 17

Internal energy is the sum of all the forms of

Question # 18

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 19

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

Question # 20

In all natural processes where heat flows from one system to another, there is always a net

Question # 21

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

Question # 22

According to kinetic theory of gases, molecules of a gas behave like

Question # 23

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

Question # 24

The relationship between Boltzmann constant k with R and NAis given as:

Question # 25

The unit of thermodynamical scale is

Question # 26

First law of thermodynamics is consequence of conservation of

Question # 27

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
2 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
3 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
4 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
5 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
6 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
7 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
8 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
9 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
10 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them

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