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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
What happen to entropy in an irreversible cycle.
Choose an answer
No gain in entropy
No change in entropy
Loss of entropy
A net gain of entropy
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Question # 2
A sample of an ideal gas may i) energy adiabatically, or ii) Expand isothermally. the net flow of heat into the gas from the exterior is.
Choose an answer
Positive is each case
Negative for i) and positive for ii)
Zero for i) and positive for ii)
Positive for i) and negative for ii)
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Question # 3
Which kind of motion is exhibited by molecules of monoatomic gas.
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Rotatory
Vibratory
Translatory
Random
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Question # 4
Gases exert pressure on walls of the vessels because gas molecules.
Choose an answer
Possess momentum
Have finite volume
Collide with each other
Obey gas laws
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Question # 5
On what factor the internal energy of a thermodynamic system depend upon.
Choose an answer
History
State
Process
Surroundings
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Question # 6
Which statement about convection is correct.
Choose an answer
Brownian motion is a form of convection
Convection occurs only in gas
Convection results from a density change
Evaporation is a form of convection
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Question # 7
Which of the following is heat transfer by means of the emission or absorption of electromagnetic radiation such as sunshine.
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Conduction or diffusion
Convection
Radiation
Mass transfer
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Question # 8
Internal energy of a gas decreased when
Choose an answer
It gains heat
Change in cycle
Change in adiatatic
Change in reversible
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Question # 9
The SI unit of heat capacity is.
Choose an answer
kg J
Kg J-1
J K-1
Kg J-1 K-1
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Question # 10
Efficiency of a Carnot engine can never be 1 or 100% unless cold reservoir is at absolute temperature.
Choose an answer
0 K
100 K
273 K
373 K
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Question # 11
The amount of heat needed per unit mass to raise the temperature of a system one degree at constant pressure is numerically aqual to
Choose an answer
The specific heat
The specific thermal energy
The specific heat at constant pressure
the internal energy of the gas
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Question # 12
What is the minimum number of thermodynamic parameters required to specify the state of gas system.
Choose an answer
1
2
3
Infinite
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Question # 13
To which law of thermodynamics, the concept of temperature is related to.
Choose an answer
Zeroth law
First law
Second law
Third law
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Question # 14
Which quantity is common for systems in thermal equilibrium.
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Heat
Temperature
Momentum
Specific heat
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Question # 15
The pressure necessary to liquify a gas at the critical temperature is called.
Choose an answer
Normal pressure
Atmospheric pressure
Critical pressure
Liquid pressure
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Question # 16
Which of the following is the ideal gas equation.
Choose an answer
PV -n RT
P/V = n RT
V/P = nR/T
PV = T/nR
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Question # 17
The efficiency of Carnot engine is
Choose an answer
Less than one
Zero
Greeter than one
Infinite
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Question # 18
Because of second law of thermodynamics about the direction of energy flow what is possible.
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Heat
Light
Energy
life
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Question # 19
Which of the following should not change in isothermal operation.
Choose an answer
Heat constant
Volume
Pressure
Temperature
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Question # 20
The normal Human body temperature in Fahrenheit scale is.
Choose an answer
32
o
F
40
o
F
98.4
o
F
212
o
F
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Question # 21
The transfer of thermal energy between regions of matter due to a temperature gradient is called.
Choose an answer
Conduction
Radiation
Convection
Sublimation
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