At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.
A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease; depends on the gas
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Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.
A. Reaction mechanism
B. Calculation of rates
C. Energy transformation from one form to the another
D. None of these
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A gas can be liquified by pressure alone only, when its temperature is __________ its critical temperature.
A. Less than
B. More than
C. Equal to or higher than
D. Less than or equal to
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In case of a close thermodynamic system, there is __________ across the boundaries.
A. No heat and mass transfer
B. No mass transfer but heat transfer
C. Mass and energy transfer
D. None of these
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Clausius - Clayperon equation is applicable to __________ equilibrium processes.
A. Solid-vapor
B. Solid-liquid
C. Liquid-vapor
D. All of the above
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In any spontaneous process, the __________ free energy decreases.
A. Helmholtz
B. Gibbs
C. Both A & B
D. Neither A nor B
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Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
A. Below
B. At
C. Above
D. Either B or C
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Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
A. Zeroth
B. First
C. Second
D. Third
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Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.
A. 1st
B. Zeroth
C. 3rd
D. None of these
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A refrigerator works on the principle of __________ law of thermodynamics.
A. Zeroth
B. First
C. Second
D. Third
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Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.
A. Less than
B. Same as
C. More than
D. Half
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An isolated system can exchange __________ with its surroundings.
A. Matter
B. Energy
C. Neither matter nor energy
D. Both matter and energy
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The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
A. Kinematic viscosity
B. Work
C. Temperature
D. None of these
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Domestic refrigerator usually works on the __________ refrigeration cycle.
A. Carnot
B. Air
C. Absorption
D. Vapour-ejection
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At absolute zero temperature, the __________ of the gas is zero.
A. Pressure
B. Volume
C. Mass
D. None of these
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The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
A. Increases
B. Decreases
C. Remains unchanged
D. Decreases linearly
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The expression for entropy change given by, Δ S = nR l n ( V 1 V 2 ) + n C v l n ( T 1 T 2 ) is valid for
A. Reversible isothermal volume change
B. Heating of a substance
C. Cooling of a substance
D. Simultaneous heating and expansion of an ideal gas
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On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line ( ∂ V ∂ P ) S and the slope of the reversible isothermal line ( ∂ V ∂ P ) T are related as (where, y = C v C p )
A. ( ∂ V ∂ P ) S = ( ∂ V ∂ P ) T
B. ( ∂ V ∂ P ) S = [ ( ∂ V ∂ P ) T ] y
C. ( ∂ V ∂ P ) S = y ( ∂ V ∂ P ) T
D. ( ∂ V ∂ P ) S = y 1 ( ∂ V ∂ P ) T
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Trouton's ratio is given by (where λ b = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K )
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Isentropic process means a constant __________ process.
A. Enthalpy
B. Pressure
C. Entropy
D. None of these
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