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

Boyle's law is applicable in

Question # 2

When two objects come to common temperature, the body is said to be in:

Question # 3

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

Question # 4

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

Question # 5

The temperature of gas is produced by

Question # 6

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 7

At constant volume temperature is increased. Then

Question # 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

Question # 9

A reversible cycle is the one in which

Question # 10

Energy gas behaves like an ideal gast at

Question # 11

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

Question # 12

The example of reversible process is

Question # 13

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

Question # 14

According to the second law, which is must to produce work

Question # 15

In an ideal gas, the molecules have:

Question # 16

Electromagnetic waves emitted by hot bodies are called:

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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 # 21

First law of thermodynamics is consequence of conservation of

Question # 22

The second law of thermodynamics is concerned with the circumstances in which

Question # 23

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

Question # 24

The value of E0in coulomb's law is:

Question # 25

The pressure exerted by the gas is

Question # 26

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 27

The Boltzman constant has the value

Question # 28

Which quantity is important in stating the entropy of the system

Question # 29

Efficiency of carnot engine is independent of the

Question # 30

A heat engine is that which converts

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
2 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
3 An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
4 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
5 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
6 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
7 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
A. 0°C
B. 10°C
C. 17°C
D. 20°C
8 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
9 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
10 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None

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