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

Question # 2

Which of the following is not an assumption of kinetic energy

Question # 3

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

Question # 4

The basis to define a temperature scale that is independent of material properties is provided by

Question # 5

Hotness and coldness of an object is represented in terms:

Question # 6

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

Question # 7

Efficiency of carnot engine is independent of the

Question # 8

When two objects are rubbed together, their internal energy

Question # 9

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

Question # 10

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 # 11

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 12

If the formula PV = nRT, n denotes:

Question # 13

Internal energy is the sum of all the forms of

Question # 14

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 15

The concept of entropy was introduced into the study of thermodynamics in

Question # 16

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 # 17

The temperature of gas is produced by

Question # 18

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

Question # 19

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

Question # 20

The volume of universal gas constant R is:

Question # 21

First law of thermodynamics is consequence of conservation of

Question # 22

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

Question # 23

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

Question # 24

The internal energy of an ideal gas system is generally the

Question # 25

The efficiency of diesel engine is

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If an amount of heat enters the system it could
A. decrease the internal energy
B. not change the internal energy
C. increase the internal energy
D. none of them
2 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
3 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
4 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
5 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
6 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
7 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
8 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
9 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
10 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C

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