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 temperature of gas is produced by

Question # 2

Rate of diffusion is

Question # 3

The work done by the system on its environment is considered as

Question # 4

The internal energy of a system does not depend upon the

Question # 5

Which of the following is not an assumption of kinetic energy

Question # 6

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

Question # 7

The ideal gas law is

Question # 8

The volume of universal gas constant R is:

Question # 9

Internal energy is the sum of all the forms of

Question # 10

First law of thermodynamic is special case of

Question # 11

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 12

A carnot cycle consists of

Question # 13

Adiabatic change occurs when the gas

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

In a heat engine, heat is supplied by the

Question # 16

An isochoric process is one which take place at

Question # 17

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

Question # 18

Sadi carnot described an ideal heat engine in

Question # 19

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

Question # 20

Carnot heat engine only used

Question # 21

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

Question # 22

Which of the following is a state variable

Question # 23

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 24

Which of the following is not an example of adiabatic process

Question # 25

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 26

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 27

The curve representing an isothermal process is called

Question # 28

Which quantity is important in stating the entropy of the system

Question # 29

Gas constant per molecule is called:

Question # 30

The motion of molecules in gases is:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
2 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
3 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
4 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
5 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
6 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
7 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
8 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
9 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
10 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them

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