85. Molecular volume of any perfect gas at 600 x 10^3 N/m2 and 27 °C will be
A.4.17 m^3/kg-mol
B.400 m^3/kg-mol
C.0.15 m^3/kg-mol
D.41.7 m^3/kg-mol

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86. The more effective way of increasing efficiency of Carnot engine is to
A.Increase higher temperature
B.Decrease higher temperature
C.Increase lower temperature
D.Decrease lower temperature

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87. For reversible adiabatic process, change in entropy is
A.Maximum
B.Minimum
C.Zero
D.Unpredictable

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88. Entropy change depends on
A.Heat transfer
B.Mass transfer
C.Change of temperature
D.Thermodynamic state

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89. Isochoric process is one in which
A.Free expansion takes place
B.Very little mechanical work is done by the system
C.No mechanical work is done by the system
D.All parameters remain constant

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90. Energy can neither be created nor destroyed but can be converted from one form to other, is inferred from
A.Zeroth low of thermodynamic
B.First law of thermodynamics
C.Second law to thermodynamics
D.Basic law of thermodynamics

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91. First law of thermodynamics furnishes the relationship between
A.Heat and work
B.Heat, work and properties of the system
C.Various properties of the system
D.Various thermodynamic processes

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