GATE CH 2022 Paper 1 — page 11

Complete GATE CH 2022 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 31–33 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 11 of 22

Consider steady-state diffusion in a binary

liquid at constant temperature and pressure. The mole-fraction of

at two different locations is 0.8 and 0.1. Let

be the diffusive flux of

calculated assuming

to be non-diffusing, and

be the diffusive flux of

calculated assuming equimolar counter-diffusion. The quantity

is__________ (rounded off to one decimal place).

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Consider interphase mass transfer of a species

between two immiscible liquids

and

. The interfacial mass transfer coefficient of

in liquid

is twice of that in liquid

. The equilibrium distribution of

between the liquids is given by

, where

and

are the mole-fractions of

and

, respectively. The bulk phase mole-fraction of

and

is 0.10 and 0.02, respectively. If the steady-state flux of

is estimated to be 10 kmol h

, the mass transfer coefficient of

is ________ kmol h

(rounded off to one decimal place).

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A wet solid containing 20% (w/w) moisture (based on mass of bone-dry solid) is dried in a tray-dryer. The critical moisture content of the solid is 10% (w/w). The drying rate (kg m

) is constant for the first 4 hours, and then decreases linearly to half the initial value in the next 1 hour. At the end of 5 hours of drying, the percentage moisture content of the solid is ________% (w/w) (rounded off to one decimal place).

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2022 · Paper 1

Question 31

Question 32

Question 33