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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
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 # 2
An ideal engine can be 100% efficient only if its exhaust temperatute.
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Equal to input temperature
Less than is input temperature
More than its input temperature
0
o
C
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Question # 3
On increasing the temperature of source efficiency of Carnot engine.
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Increase
Decrease
First increases and then decreases
Does not change
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Question # 4
When a hot liquid is mixed with a cold liquid temperature of the mixture.
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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 # 5
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 # 6
The specific heat capacity of a substance is the amount of heat required to.
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Raise its temperature by 1 K
Raise the temperature of 1 kg of the substance by 1 K
Melt 1 kg of the substance
Boil 1 kg of the substance
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Question # 7
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 # 8
Which of the following is a thermodynamic temperature scale.
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Celsius scale
Fahrenheit scale
Kelvin scale
Rankine scale
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Question # 9
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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Question # 10
A diatomic gas contains only
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Translational K.E.
Rotational K.E.
Vibrational K.E.
All of these
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Question # 11
The internal energy of monoatomic gas is.
Choose an answer
3/2 RT
Independent of temperature
In the form of K.E.
Partially kinetic and partially potential
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Question # 12
An inflated tyre suddenly bursts As a result of this temperature of the surrounding
Choose an answer
Increases
Descreases
Remains constant
May increase or decrease
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Question # 13
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 # 14
When heat a supplied to a metallic sphere which one of the following changes will occur.
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the mass of the sphere increases
The volume of the sphere increases
The density of the sphere increases
The internal energy of the sphere increases
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Question # 15
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 # 16
Which of the following is a thermodynamic potential
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Internal energy
Enthalpy
Gibb's free energy
All of these
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Question # 17
On which parameter, the heat capacity of a material depends upon.
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Density of the material
Specific heat of the material
Temperature of the material
Structure of the material
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Question # 18
Significant motion for the molecules of a monoatomic gas is.
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Rotatory
Vibratory
Translatory
Random
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Question # 19
Law of increase of entropy is a result of
Choose an answer
First law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics
Zeroth law of thermodynamics
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Question # 20
The specific heat of a substance is a function of its
Choose an answer
mass
Weight
Volume
Molecular structure
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