Chemical Engineering MCQs

Page No. 642

Which of the following mixtures does not form an azeotrope at atmospheric pressure ?


aWater-alcohol

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bMethyl alcohol-acetone

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cButyl acetate-water

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dNone of these

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View Answer None of these

‘Absorption with chemical reaction’ is involved in the removal of__________________?


aCarbon dioxide from gaseous stream using alkaline solution

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bBenzol from coke oven gas using solar oil/wash oil

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cAmmonia from coke oven gas using refrigerated water

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dTar from coke oven gas in primary gas coolers using chilled water

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Which of these columns incurs the lowest pressure drop ?


aPacked column (with stacked packing)

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bPacked column (with dumped packing)

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cBubble plate column

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dPulse column

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Extraction of penicillin employs a ________________ extraction column?


aCentrifugal

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bPacked

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cPlate

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dNone of these

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View Answer Centrifugal

When adsorption hysteresis is observed, the desorption equilibrium pressure is _________________ that obtained by adsorption?


aAlways lower than

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bAlways higher than

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cSame as

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dDependent on the system; can be either lower or higher than

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View Answer Always lower than

On addition of solute in the solvent, the ______________ of the solution decreases ?


aBoiling point

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bFreezing point

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cVapour pressure

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dBoth B. and C.

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View Answer Both B. and C.

______________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids ?


aWetted wall

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bPacked

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cPlate

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dSpray

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View Answer Plate

Which of the following equipments is not used for gas dispersion ?


aAgitated vessels

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bBubble cap tray towers

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cPerforated sieve tray towers

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dSpray towers

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View Answer Spray towers

If xD = overhead product molal composition and RD = reflux ratio, then slope and intercept of the operating line for rectifying section are respectively ?


a[xD/(RD + 1)], [RD/(RD + 1)]

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b[RD/(RD + 1)], [xD/(xD + 1)]

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c[xD/(RD + 1)], [(RD + 1)/RD]

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dNone of these

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Hydrogenation of oil is carried out in a/an _______________ in Vanaspati manufacturing plant?


aAgitated vessel

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bSieve tray column

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cBubble cap column

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dPacked tower

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View Answer Agitated vessel

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