Chemical Engineering MCQs

Page No. 421

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


akcal/kg-mole.°C

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bBtu/lb-mole.°R

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ckcal/kg-mole.°K

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dBoth B. & C.

✓


View Answer Both B. & C.

Avogadro’s number is equal to__________________?


a6.023 × 1023 molecules/kg.mole

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b6.023 × 1023 molecules/gm.mole

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c6.023 × 1016 molecules/kg.mole

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d6.023 × 1026 molecules/gm.mole

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


a1.5

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b15

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c150

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d1500

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View Answer 1500

A saturated vapor on being compressed would___________________?


aCondense

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bForm wet steam

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cBoth A. & B.

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dNeither A. nor B.

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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

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bIntermolecular forces of attraction

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cPotential energy

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dTotal energy

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View Answer Kinetic energy

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


aIncreases

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bDecreases

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cRemains unchanged

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dIncreases exponentially

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View Answer Decreases

One micron is equal to _____________ cm?


a10-2

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b10-4

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c10-6

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d10-8

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View Answer 10-4

Kopp’s rule is useful for the determination of_____________________?


aMolal heat capacities of gases

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bHeat capacities of solids

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cActivation energy

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dHeat capacities of gases

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


aW/m2°C

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bJ/kg°K

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cW/m°K

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dJ/m3°K

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View Answer J/kg°K

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


aInversely

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bExponentially

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cLinearly

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dNegligibly

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View Answer Linearly

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