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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
How many calories of heat are required to evaporate completely 1 g of ice at 0
o
C
Choose an answer
480 calories
720 calories
940 calories
1170 calories
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Question # 2
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 # 3
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 # 4
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 # 5
According to kinetic energy of gases one assumes that the collisions between the molecules are.
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Perfectly elastic
Perfectly inelastic
Partly elastic
Partly inelastic
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Question # 6
Which of the following is defined as the amount of heat required to raise the temperature of 1 g of water by 1
o
C
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Joule
BTO
Electron volt
Calorie
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Question # 7
According to kinetic theory of gases one assumes that the collisions between molecules are.
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Perfectly elastic
Perfectly inelastic
Partly elastic
Partly inelastic
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Question # 8
Law of increase of entropy is a result of
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First law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics
Zeroth law of thermodynamics
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Question # 9
Thermodynamics concern its primary with the
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Measurement of quantity of heat
Physical effects of temperature changes
Conversion of heat into other energy forms
Behavior of gases
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Question # 10
A Carnot engine can be 100% efficient of the sink is at.
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0 k
0 oF
0 oC
273 K
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Question # 11
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 # 12
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 # 13
Which statement about convection is correct.
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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 # 14
The heat required to sublime one mole of the substance at standard temperature and pressure is called.
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Latest heat
Specific heat
Heat of sublimation
Heat capacity
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Question # 15
What happen to entropy in an irreversible cycle.
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No gain in entropy
No change in entropy
Loss of entropy
A net gain of entropy
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Question # 16
Which following properties of molecules of a gas is same for all gases at a particular temperature.
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Momentum
Mass
velocity
K.E.
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Question # 17
Two stem engine A and B have their sources at 900 K and 600 K and their sinks are at 450 K and 300 K respectively.
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They are equally efficient
A is less efficient than B
a is more efficient than B
Their efficiencies cannot be determined
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Question # 18
What is a thermal properly of a material that determines the quantity of energy required to change the phase of a unit mass of that substance.
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Specific heat
Latent heat
Internal energy
Specific energy
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Question # 19
Andrews isothermal helps to messure
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Boiling point
Boyle's temperature
Temperature of inversion
Critical temperature
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Question # 20
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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