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

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 2

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

Question # 3

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

Question # 4

The ideal gas law is

Question # 5

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 6

The motion of molecules in gases is:

Question # 7

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

Question # 8

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 # 9

The value of E0in coulomb's law is:

Question # 10

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

Question # 11

The number of translation degress of freedom for a diatomic gas is

Question # 12

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 # 13

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 14

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 15

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

Question # 16

Pressure exerted by a gas is

Question # 17

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

Question # 18

Which of the following is not an example of adiabatic process

Question # 19

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 20

For the working of a heat engine, there must be

Question # 21

Internal energy is the sum of all the forms of

Question # 22

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

Question # 23

A diatomic gas molecule has

Question # 24

The internal energy of an ideal gas system is generally the

Question # 25

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

Question # 26

Truth of kinetic energy is confirmed by:

Question # 27

Rate of diffusion is

Question # 28

The efficiency of diesel engine is

Question # 29

Rice takes longest to cook

Question # 30

The example of irreversible process is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
4 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
5 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
6 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
7 If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:
A. Force
B. Density
C. Work done
D. Pressure
8 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
9 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
10 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F

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