GATE CH 2017 Paper 1 — page 15

Questions 43–45 of 65. Imported answers require review unless explicitly marked reviewed.

The Sherwood number (

) correlation for laminar flow over a flat plate of length

is given by

where

and

represent Reynolds number and Schmidt number, respectively. This correlation, expressed in the form of Chilton-Colburn

factor, is

Your answerChoose one option.

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In a countercurrent stripping operation using pure steam, the mole ratio of a solute in the liquid stream is reduced from 0.25 to 0.05. The liquid feed flowrate, on a solute-free basis, is 3 mol/s. The equilibrium line for the system is given in the figure below.

Diagram for Chemical Engineering question 44

The MINIMUM flowrate of pure steam for this process, rounded to 1 decimal place, is ______ mol/s.

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In a batch adsorption process, 5 g of fresh adsorbent is used to treat 1 liter of an aqueous phenol solution. The initial phenol concentration is 100 mg/liter. The equilibrium relation is given by

where

is the amount of phenol adsorbed in mg of phenol per gram of adsorbent, and

is the concentration of phenol in mg/liter in the aqueous solution. When equilibrium is attained between the adsorbent and the solution, the concentration of phenol in the solution, rounded to 1 decimal place, is __________ mg/liter.

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2017 · Paper 1

Question 43

Question 44

Question 45