Chemical Engineering MCQs

Page No. 663

When the solvent dissolves very little of solute, then__________________________?


aSolvent of low latent heat of vaporisation should be used

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bSolvent of low freezing point should be used

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cLarge quantity of solvent is required to extract the solute

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dVery small quantity of solvent is required

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Tea percolation employs___________________________?


aLiquid-liquid extraction

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bLeaching

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cAbsorption

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dNone of these

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View Answer Leaching

The equipment used in the extraction of highly corrosive radioactive liquids is_______________________?


aPulse column

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bSpray column

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cMixer settler

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dBaffle tower

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View Answer Pulse column

With increase in temperature, the solubility of gases in liquids, at fixed pressure____________________?


aIncreases

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bDecreases

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cRemain same

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dEither A. or B., depends on the system

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View Answer Decreases

Degree of freedom for leaching and solvent extraction process is_____________________?


a0

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b1

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c2

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d3

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View Answer 3

Unit operation involved in the prilling of urea is_____________________?


aEvaporation

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bDrying

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cCrystallisation

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dBoth B. and C.

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View Answer Both B. and C.

In physical terms, Schmidt number means _________________?


aThermal diffusivity/mass diffusivity

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bThermal diffusivity/momentum diffusivity

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cMomentum diffusivity/mass diffusivity

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dMass diffusivity/thermal diffusivity

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At __________________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation?


aOperating

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bTotal

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cMinimum

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dMaximum permissible

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View Answer Total

In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________________ its relative saturation?


aLower than

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bHigher than

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cEqual to

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dEither A. or B., depends on the mixture composition

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View Answer Lower than

Flash distillation is suitable for separating the constituents of a binary system, which _____________________?


aForm minimum boiling azeotrope

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bHave very wide boiling points

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cHave very close boiling points

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dForm constant boiling azeotrope

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