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 product of the pressure and volume of an ideal gas is

Question # 2

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

Question # 3

A succession of events which bring the system back to its initial condition is called

Question # 4

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

Question # 5

Energy gas behaves like an ideal gast at

Question # 6

At constant volume temperature is increased. Then

Question # 7

In an ideal gas, the molecules have:

Question # 8

The absolute temperature of the tripple point of water is

Question # 9

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

Question # 10

The Boltzman constant has the value

Question # 11

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

Question # 12

The internal energy of an ideal gas system is generally the

Question # 13

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 14

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 15

Which of the following is not thermo dynamical function?

Question # 16

Hotness and coldness of an object is represented in terms:

Question # 17

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 18

A diatomic gas molecule has

Question # 19

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 # 20

A carnot cycle consists of

Question # 21

The unit of thermodynamical scale is

Question # 22

In an adiabatic expansion, the temperature of the gas

Question # 23

Boyle's law is applicable in

Question # 24

The bicycle pump provides a good example of

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Absolute temperature can be calculated by

Question # 29

The curve representing an adiabatic process is called

Question # 30

The internal energy of a system does not depend upon the

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
4 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
5 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
6 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them
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 absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
9 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
10 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
A. A greater than than of B
B. A is equal to that of B
C. A is less than that of B
D. A is twice the pressure of B

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