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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
If we place oure hand below a lighted lamp we feel warmer due to.
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Conduction
Convection
Radiation
None of these
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Question # 2
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 # 3
Which of the following is the science of measuring the heat of chemical reactions or physical changes.
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Thermometry
Calorimetry
Telemetry
Photometry
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Question # 4
In order of a cyclic heat engine operating between two heat reservoirs to be as efficient as a Carnot engine. It must be.
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A gas engine
Adiabatic
Reversible
A refrigerator
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Question # 5
Mean free path of gas molecules in inversely proportional to its.
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Weight
Temperature
Pressure
Volume
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Question # 6
The mechanical equivalent of heat is.
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Physical quantity
Constant
Conversion factor
Zero
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Question # 7
Difference between Cp and Cv is equal to
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General gas constant
Planck's conatant
Molar gas constant
Boltzmann's constant
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Question # 8
Why an even Carnot engine Carnot give 100% efficiency.
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We cannot find ideal sources
We cannot eliminate friction
We cannot reach absolute zero temperature
We cannot remove heat
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Question # 9
Which one is the primary standard for temperature measurement.
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Resistance thermometer
Mercury in glass thermometer
Constant volume gas thermometer
Pyrometer
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Question # 10
In an isobaric process there is no.
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Pressure change
Internal energy change
Heat exchanged
volume change or work done
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Question # 11
Mean free path of gas molecules is inversely proportional to its.
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Volume
Pressure
Temperature
Weight
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Question # 12
Contrivances for converting heat into work are called.
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Heat pumps
Heat engines
IC engines
Jet engine
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Question # 13
Gases exert pressure on walls of the vessels because gas molecules.
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Possess momentum
Have finite volume
Collide with each other
Obey gas laws
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Question # 14
When a solid is melting the temperature remains constant even through heat is being supplied because the
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Heat is being used to break up the intermolecular bonds
Solid is not absorbing any heat
Molecules are moving faster
Molecules are farther a part
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Question # 15
In an isochoric process.
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Volume changes
Pressure changes
Temperature changes
Volume remains constant
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Question # 16
What type of process is the Carnot's cycle.
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Reversible
Irreversible
Neither reversible nor irreversible
May be reversible or irreversible
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Question # 17
The process in which no heat enters or leaves the system is called.
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Isdobaric
Isochoric
Isothermal
Adiabatic
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Question # 18
if temperature eon Celsius scale is 50 oC the temperature on Fahrenheit scale will be.
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102
o
F
108
o
F
112
o
F
122
o
F
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Question # 19
If T1 and T2 are source and sink temperature respectively Carnot efficiency is.
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T1+T2/T1
T1-T2/T1
T1+T2/T2
T1-T2/T2
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Question # 20
In which thermodynamic process enthalpy of the system remains constant.
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Isenthalpic process
Isolated process
Isobaric process
Isochoric process
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Question # 21
The SI unit of heat capacity is.
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kg J
Kg J-1
J K-1
Kg J-1 K-1
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