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

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

Question # 2

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 3

The curve representing an isothermal process is called

Question # 4

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

Question # 5

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

Question # 6

A real gas can be approximated to an ideal gas at

Question # 7

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

Question # 8

One mole of any substance contain

Question # 9

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

Question # 10

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

Question # 11

Heat travels through vacuum by

Question # 12

One kilogram of different substances contain

Question # 13

The pressure exerted by the gas is

Question # 14

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 15

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

Question # 16

Rate of diffusion is

Question # 17

Generally a temperature scale is established by

Question # 18

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

Question # 19

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

Question # 20

The earliest heat engine was

Question # 21

Which of the following is a state variable

Question # 22

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

Question # 23

In the theory of dimensional analysis, heat may be properly represented by:

Question # 24

Triple point of water is

Question # 25

No spark plug is needed in

Question # 26

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

Question # 27

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 28

During the whole carnot cycle

Question # 29

Which of the following is not an assumption of kinetic energy

Question # 30

Which quantity is important in stating the entropy of the system

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
3 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
4 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
5 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
6 For the working of a heat engine, there must be
A. a source of heat at high temperature
B. a sink at low temperature
C. both of them
D. none of them
7 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
8 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
9 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
10 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

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