Chemical Engineering MCQs

Page No. 421

The value of the gas-law constant ‘R’ is 1.987 ?


akcal/kg-mole.°C


bBtu/lb-mole.°R


ckcal/kg-mole.°K


dBoth B. & C.


View Answer Both B. & C.

Avogadro’s number is equal to__________________?


a6.023 × 1023 molecules/kg.mole


b6.023 × 1023 molecules/gm.mole


c6.023 × 1016 molecules/kg.mole


d6.023 × 1026 molecules/gm.mole



The density of a liquid is 1500 kg/m3. Its value in gin/litre will be equal to________________?


a1.5


b15


c150


d1500


View Answer 1500

A saturated vapor on being compressed would___________________?


aCondense


bForm wet steam


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal______________?


aKinetic energy


bIntermolecular forces of attraction


cPotential energy


dTotal energy


View Answer Kinetic energy

With rise in temperature, the solubility of ammonia in water at a fixed pressure__________________?


aIncreases


bDecreases


cRemains unchanged


dIncreases exponentially


View Answer Decreases

One micron is equal to _____________ cm?


a10-2


b10-4


c10-6


d10-8


View Answer 10-4

Kopp’s rule is useful for the determination of_____________________?


aMolal heat capacities of gases


bHeat capacities of solids


cActivation energy


dHeat capacities of gases



The unit of specific heat at constant pressure, Cp, in SI unit is__________________?


aW/m2°C


bJ/kg°K


cW/m°K


dJ/m3°K


View Answer J/kg°K

For an ideal solution, the total vapor pressure varies _____________ with the composition (expressed as mole fraction)?


aInversely


bExponentially


cLinearly


dNegligibly


View Answer Linearly

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