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 quantity is important in stating the entropy of the system

Question # 3

One mole of any substance contain

Question # 4

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

Question # 5

The pressure exerted by the gas is

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

An isochoric process is one which take place at

Question # 10

Pressure exerted by a gas is

Question # 11

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 # 12

On colliding in a closed container, the gas molecules

Question # 13

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 14

When heat is added into the system then change in entropy is

Question # 15

The curve representing an isothermal process is called

Question # 16

The behaviour of gases is well accounted by the kinetic theory based on

Question # 17

The internal energy of a system does not depend upon the

Question # 18

The temperature of gas is produced by

Question # 19

Gas constant per molecule is called:

Question # 20

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 21

Absolute zero is considered as that temperature at which:

Question # 22

A process is a reversible process, if the entropy of the system

Question # 23

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

Question # 24

At absolute temperature, the kinetic energy of the molecules

Question # 25

One kilogram of different substances contain

Question # 26

The nature of thermal radiation is similar to:

Question # 27

Generally a temperature scale is established by

Question # 28

Carnot heat engine only used

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
2 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
3 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
4 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
5 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
6 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
7 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
8 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
9 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
10 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

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