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PPSC Physics Chapter 3 Thermal Properties of Matter MCQs With Answers
Question # 1
In four stroke cycle the crank makes
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One complete revolution
Two complete revolutions
three complete revolutions
Four complete reveolutions
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Question # 2
The phenomenon of Brownian motion shows that
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Molecules exist and can be seen as bright dots moving about
Molecules moves about randomly at highs speeds
Smoke particles behaves as molecules
Smoke particles can be used as models of air molecues.
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Question # 3
Which thermodynamic law state taht the entropy of a perfect system approaches zero.
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Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics
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Question # 4
Thermal conduction in metals differs from thermal conduction in insulators,. The reasons for this is that , in metals heat can be transported by.
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Electrons
Lattice vibrations
Photons
Positive ions
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Question # 5
From any substance the temperature and pressure at which the material can coexist in all three states in equilibrium is called.
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Critical point
Triple point
Initial point
Final point
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Question # 6
How many calories of heat are required to evaporate completely 1 g or ice at 0
o
C
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120 calories
520 calories
720 calories
920 calories
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Question # 7
When all the systems taking part in a process are included, the entropy.
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Decreases
Either remains constant of increases
Either remains constant or decreases
Remains constnat
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Question # 8
Difference between the molar heat capacity constant pressure and that a constant volume is equal to
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Root mean square velocity
Mean free path
Boltzmann's constant
Universal gas constant
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Question # 9
The behavior of the gases that can be easily liquefied is like that of the.
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Triatomic gases
Ideal gases
Van der walls gases
Dia atomic gases
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Question # 10
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 # 11
Mean free path in a gas is the
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Distance travelled by a molecule before hitting a wall
Average distance travelled by a molecule in one second
Average distance travelled between molecules between any two successive collisions
Root mean square velocity
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Question # 12
Which quantity provides a quantitative measure of disorder.
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Entropy
Enthalpy
Randomness
Chaos
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Question # 13
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 # 14
The door of an operating refrigerator in a closed room is opened after sometime the temperature of the room will be
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Lowered
Raised
Unaffected
Become zero
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Question # 15
What is the triple point of water.
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273 .15 K
0 K
100 K
0 oC
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Question # 16
In Isochoric process there is no
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Work done
Internal energy change
Volume change or work done
Heat exchanged
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Question # 17
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 # 18
The internal energy of monoatomic gas is.
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3/2 RT
Independent of temperature
In the form of K.E.
Partially kinetic and partially potential
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Question # 19
The actual gas can behave like an ideal gas at
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Low density and high pressure
High density and high pressure
Low density and low pressure
High density and low pressure
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Question # 20
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 # 21
In ideal gas equation PV = nRT , R is
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Universal gas constant
Avogadro's number
Plank's constant
Gravitational constant
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