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

Pressure of a gas at constant volume is proportion to

Question # 2

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

Question # 3

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 4

First law of thermodynamics is consequence of conservation of

Question # 5

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

Question # 6

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 7

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 8

Rate of diffusion is

Question # 9

Which of the following is not thermo dynamical function?

Question # 10

An isochoric process is one which take place at

Question # 11

At absolute temperature, the kinetic energy of the molecules

Question # 12

A carnot cycle consists of

Question # 13

At constant volume temperature is increased. Then

Question # 14

When two objects are rubbed together, their internal energy

Question # 15

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

Question # 16

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

Question # 17

For the working of a heat engine, there must be

Question # 18

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 19

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 20

When heat is removed from the system

Question # 21

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

Question # 22

Efficiency of carnot engine is independent of the

Question # 23

First law of thermodynamic is special case of

Question # 24

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

Question # 25

Which of the following is not an assumption of kinetic energy

Question # 26

In the formula P = N0KT, N0denotes:

Question # 27

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

Question # 28

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

Question # 29

When two objects come to common temperature, the body is said to be in:

Question # 30

Which of the following does not have the same units:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
5 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
A. 300°C
B. 573°C
C. 600°C
D. 743°C
6 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
7 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
8 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
9 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
10 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them

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