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Online Tests
ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers
Question # 1
A process in which no heat enters or leaves the system is called
Choose an answer
isochoric process
isothermal process
adiabatic process
none of them
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Question # 2
Sadi carnot described an ideal heat engine in
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1820
1840
1860
1880
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Question # 3
The temperature of gas is produced by
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At potential energy of its molecules
The kinetic energy of its molecules
The attractive force between its molecules
The repulsive force between its molecules
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Question # 4
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 # 5
We can express the work in term of
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directly measurable variables
indirectly measurable variables
either of them
both of them
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Question # 6
The curve representing an adiabatic process is called
Choose an answer
isotherm
adiabat
adiable
none of them
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Question # 7
If water in a closed bottle is taken up to the moon and opened, the water gets
Choose an answer
Freeze
Boiled
Dissociated into O
2
and H
2
Evaporated
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Question # 8
First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
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how heat is absorbed
how heat extracted
how this conversion takes place
none of them
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Question # 9
Amount of heat required to raise the temperature of a body through 1 K is called its
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Specific heat
Water equivalent
Thermal capacity
Entropy
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Question # 10
The efficiency of petrol engine is usually not more than 25% to 30% because of
Choose an answer
friction
heat losses
both of them
none of them
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Question # 11
The curve representing an isothermal process is called
Choose an answer
adiabat
isotherm
fixed temperature
none of them
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Question # 12
In the formula P = N
0
KT, N
0
denotes:
Choose an answer
Number of molecules per unit per volume
Number of moles
Number of molecules
None of these
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Question # 13
A diatomic gas molecule has
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translational energy
rotaional energy
vibrational energy
all of them
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Question # 14
Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
Choose an answer
Newton's second law
Pascal's law
Carnot theorem
Second law of thermodynamics
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Question # 15
The rate of change of momentum of a molecule is equal to:
Choose an answer
Pressure
Work
Density
Force
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Question # 16
The volume of universal gas constant R is:
Choose an answer
8.314 J/K mole K
8314 J/K mole K
8.314 J/mole K
None of these
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