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Online Tests
11th Class Part 1 Physics Chapter 11 Test Online MCQs With Answers
Question # 1
A device based upon the thermodynamics property of matter is called.
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Calorimeter
Heat engine
thermometer
Voltmeter
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Question # 2
Pascal is the unit of
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Pressure
Force
Tension
Weight
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Question # 3
Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be
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3/4
9/16
4/3
10/9
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Question # 4
When hot and cold water are mixed, the entropy.
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Decreases
Increases
Remain constant
Zero
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Question # 5
The internal energy of system does not depend on
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Temperature
Pressure
Path
Final and initial state
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Question # 6
The behaviour of gases is discussed by
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Knowing their nature
Knowing their temperature
Kinetic theory
Maxwell's theory
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Question # 7
the change in internal energy is defined as
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Q - W
Q-T
Q + P
Q - P
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Question # 8
An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.
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0 K
0
o
C
100 K
100
o
C
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Question # 9
The work done is isochoric process is.
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Constant
Variable
Zero
Depend upon condition
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Question # 10
Which is an example of irreversible process.
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Explosion
Evaporation
Slow compression
A chemical explosion
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Question # 11
For a diatomic gas Cv= 5R/2 then gamma for this gas is.
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5/7
4/35
7/5
35/4
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Question # 12
The curve representing an adiabatic process is called.
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An adiabatic
An isotherm
Both of these
None of these
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Question # 13
For working of heat engine, there must be.
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A source
A sink
either of these
Both of these
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Question # 14
If heat engine absorb 400 J and rejects 200 J heat energy, its efficiency will be.
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25%
50%
70%
100%
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Question # 15
Which one is true for isothermal process.
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Q = 0
W = 0
Q = W(D) Delta U = 0
None of these
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Question # 16
The difference between tow molar capacities is equal to.
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Plank's constant
General gas equation
Molar gas constant
Boltzmann constant
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Question # 17
Heat is form of.
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Power
Momentum
Energy
Torque
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Question # 18
The molecules of an ideal gas exert
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Force on each other
No force on each other
Large force on each other
Pressure on each other
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