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Online Tests
ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers
Question # 1
The heat required to raise the temperature of one mole of the substance through 1 K is called
Choose an answer
heat capacity
specific heat capacity
molar specific heat
all of them
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Question # 2
Amount of heat required to raise the temperature of a body through 1 K is called its
Choose an answer
Specific heat
Water equivalent
Thermal capacity
Entropy
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Question # 3
On a cold morning a metal surface will fell colder to touch than a wooden surface, because
Choose an answer
Metal has high specific heat
Metal has high thermal conductivity
Metal has low specific heat
Metal has low thermal conductivity
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Question # 4
The behaviour of gases is well accounted by the kinetic theory based on
Choose an answer
microscopic approach
macroscopic approach
both of them
none of them
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Question # 5
The rate of change of momentum of a molecule is equal to:
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Pressure
Work
Density
Force
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Question # 6
If an amount of heat enters the system it could
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decrease the internal energy
not change the internal energy
increase the internal energy
none of them
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Question # 7
10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
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Each have same number of molecules
Don't have same number of molecules
Can't be predicted
None
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Question # 8
The disorder in the system increases due to the
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removal of heat
addition of heat
removal or addition of heat
none of them
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Question # 9
The absolute temperature for an ideal gas is
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directly proportional to the rotational K.E of gas molecules
directly proportional to the vibrational K.E of gas molecules
directly proportional to the average translational K.E.of gas molecules
directly proportional to the P.E. of gas molecules
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Question # 10
Heat travels through vacuum by
Choose an answer
Conduction
Convection
Radiation
Both A and B
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Question # 11
Maximum density of H
2
O is at the temperature
Choose an answer
32
°F
39.2
°F
42
°F
4
°F
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Question # 12
Sadi carnot described an ideal heat engine in
Choose an answer
1820
1840
1860
1880
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Question # 13
The work done by the system on its environment is considered as
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positive
negative
zero
any one of them
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Question # 14
The work done on the system by the environment is considered as
Choose an answer
positive
negative
zero
any one of them
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Question # 15
Which quantity is important in stating the entropy of the system
Choose an answer
initial entropy
final entropy
change in entropy
none of them
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Question # 16
Electromagnetic waves emitted by hot bodies are called:
Choose an answer
Photoelectrons
Alpha rays
Thermal radiation
None of these
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