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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
Under steady state the temperature of a body
Choose an answer
Increase's with time
Decreases with time
Does not charge with time
None of the above
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Question # 2
Which quantity must be the same for two bodies if they are to be in thermal equilibrium.
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Internal energy
P.E
Temperature
Mass
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Question # 3
What is the total entropy change during an reversible cycle.
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Unity
Infinite
Zero
Cannot be detected
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Question # 4
No entropy change is associated with
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Isothermal process
Adiabatic process
Isochoric process
Isoteric process
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Question # 5
What is a measure of the total energy of a thermodynamics system.
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Entropy
Enthalpy
Randomness
Chaos theory
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Question # 6
Which of the following pairs represent units of the same physical quantity.
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Kelvin and joule
Kelvin and calrorie
Newton and calorie
Joule and calorie
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Question # 7
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 # 8
A heat engine with 100% efficiency would have to
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Do no work
Be at a uniform temperature
Use no heat
Discharge at 0
o
C
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Question # 9
Gas law PV = constant is for
Choose an answer
Adiabatic change
Isothermal changes
Isobaric changes
Isochoric changes
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Question # 10
Which kind of motion is exhibited by molecules of monoatomic gas.
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Rotatory
Vibratory
Translatory
Random
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Question # 11
When a hot liquid is mixed with a cold liquid temperature of the mixture.
Choose an answer
First decreases and then becomes constant
First increases and then becomes constant
Continuously decreaes
Is undefined for some time and then nearly becomes constant
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Question # 12
Thermal conduction in metals differs from thermal conduction in insulators,. The reasons for this is that , in metals heat can be transported by.
Choose an answer
Electrons
Lattice vibrations
Photons
Positive ions
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Question # 13
The gas temperature is increased from 27
o
C to 127
o
C What is the ratio of mean kinetic energies.
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3/4
4/3
9/10
10/9
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Question # 14
The follow of heat from hot body to cold body is an example of
Choose an answer
Adiabatic process
Isothermal process
Reversible process
Irreversible process
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Question # 15
Convention is the transfer of thermal energy by means of currents in
Choose an answer
Pressure
Temperature
Liquids
Fluids
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Question # 16
What happens to Carnot efficiency if the source temperature increases.
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Decreases
Increases
Remain the same
Becomes zero
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Question # 17
The expression PV/KT represents.
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Number of moles of the gas
Number of molecules in the gas
Total mass of the gas
Density of the gas
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Question # 18
An immersion heater rated at 150 W is fitted into a large block of ice at 0 oC. The specific latent heat of fusionism 300 J g-1. How long does it take to melt 10 g of ice.
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5 s
10 s
15 s
20 s
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Question # 19
In general work done on or by a gas depends on.
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The initial state only
The final state only
The initial and final states
The initial state the final state and the path
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Question # 20
Gas exert pressure on walls of the visual because gas molecules.
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Posses momentum
Have finite volume
Collide with each other
Obey gas laws
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Question # 21
A metallic rod is continuously heated at its two ends, The heat following through the rod does not depend upon.
Choose an answer
Mass of the upon
Area of cross section of the rod
Temperature gradient between two ends
Time for which heat flow through the rod
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