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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
To which law of thermodynamics, the concept of temperature is related to.
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Zeroth law
First law
Second law
Third law
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Question # 2
During an adiabatic gas expansion the environment
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Serves as a heat sink
Serves as a heat source
Must be at a higher temperature than the gas
Does not have to participate
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Question # 3
Why freezer a refrigerator is located in the top section
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Motor is not affected
Heat gained from environment is less
The entire chamber of freezer is cooled quickly
Heat gained from environment is more
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Question # 4
The law of equation of energy is applicable to the system whose constituents are.
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At rest
In orderly motion
in random motion
Moving at constant speed
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Question # 5
Mean free path of gas molecules is inversely proportional to its.
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Volume
Pressure
Temperature
Weight
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Question # 6
The heat accepted and rejected by a Carnot engine operating between two heat reservoirs defines.
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The efficiency of the working substance of the engine
the ideal gas scale of temperature
The ratio of the absolute temperature of the reservoirs
The thermal capacity of the working substance
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Question # 7
The efficiency of a diesel engine is about
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15% to 35 5
355 to 40%
45% to 655
505 to 65 %
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Question # 8
In which given process does the system always return to the original thermodynamic state.
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Cyclic
Adiabatic
isothermal
Isobaric
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Question # 9
What kind of movement is dictated by the laws of thermodynamcis.
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Energy motion
Heat work
Light heat
Energy light
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Question # 10
In the gas equation PV =nRT , V is the volume of.
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1 g of gas
1 L of gas
1 mol of gas
1 kg of gas
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Question # 11
The pressure of a gas is directly proportions to
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Mean velocity of the molecules
Mean square velocity of the molecules
Root mean square velocity of the molecules
Instantaneous velocity of the molecules
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Question # 12
A gas thermometer is more sensitive than a mercury thermometer because the expansion of gas for 1 o/c rise in temperature is.
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Five times as much as mercury
Ten times as much as mercury
Twenty times as much as mercury
Hundred times as much as mercury
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Question # 13
The pressure necessary to liquify a gas at the critical temperature is called.
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Normal pressure
Atmospheric pressure
Critical pressure
Liquid pressure
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Question # 14
Efficiency of a Carnot engine can never be 1 or 100% unless cold reservoir is at absolute temperature.
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0 K
100 K
273 K
373 K
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Question # 15
Which gas strictly obeys gas laws.
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Hydrogen gas
Inert gas
Ideal perfect gas
Helium gas
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Question # 16
What is the minimum number of thermodynamic parameters required to specify the state of gas system.
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1
2
3
Infinite
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Question # 17
A perfect gas is one whose
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Molecules are masless
Molecules are energetic
Molecules are perfectly elastic
Molecules are at rest
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Question # 18
The kinetic molecular model of matter describe matter an being made up of molecules in continuous.
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Vibratory motion
Random motion
rotatory motion
Linear motion
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Question # 19
Below which temperature gas can be liquified by increasing its pressure.
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Natural temperature
Boyle temperature
Critical temperature
Absolute zero
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Question # 20
The gas thermometer is taken as the primary standard because.
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Thermometers are easily reproducible
Readings can be accurately taken
No correction are necessary
It produces he thermodynamic scale
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Question # 21
Which of the following is a clinical thermometer.
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Gas thermometer
Mercury thermometer
Alcohol thermometer
Radiation thermometer
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