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

Question # 2

Which of the following is not an assumption of kinetic energy

Question # 3

Generally a temperature scale is established by

Question # 4

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

Question # 5

We cannot utilize the heat contents of oceans and atmosphere because

Question # 6

The rate of change of momentum of a molecule is equal to:

Question # 7

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

Question # 8

The pressure exerted by the gas is

Question # 9

The internal energy of a system does not depend upon the

Question # 10

Pressure may be define as _______ per second per unit area:

Question # 11

A reversible cycle is the one in which

Question # 12

The earliest heat engine was

Question # 13

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

Question # 14

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 15

The motion of molecules in gases is:

Question # 16

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 17

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

Question # 18

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 19

Gas constant per molecule is called:

Question # 20

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

Question # 21

No spark plug is needed in

Question # 22

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 23

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

Question # 24

If the formula PV = nRT, n denotes:

Question # 25

The absolute temperature for an ideal gas is

Question # 26

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 27

At constant volume temperature is increased. Then

Question # 28

A heat engine is that which converts

Question # 29

A diatomic gas molecule has

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
2 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
3 The volume of universal gas constant R is:
A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
4 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
5 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
6 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
7 The basis to define a temperature scale that is independent of material properties is provided by
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle
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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
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 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1

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