GATE CH 2019 Paper 1 — page 9

Questions 25–27 of 65. Imported answers require review unless explicitly marked reviewed.

Three distillation schemes for separating an equimolar, constant relative volatility ABC mixture into nearly pure components are shown. The usual simplifying assumptions such as constant molal overflow, negligible heat loss, ideal trays are valid. All the schemes are designed for minimum total reboiler duty. Given that the relative volatilities are in the ratio

, the correct option that arranges the optimally-designed schemes in ascending order of total reboiler duty is

Diagram for Chemical Engineering question 15

Your answerChoose one option.

I, II, III

III, I, II

II, I, III

III, II, I

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Consider the two countercurrent heat exchanger designs for heating a cold stream from

, as shown in figure. The hot process stream is available at

. The inlet stream conditions and overall heat transfer coefficients are identical in both the designs. The heat transfer area in Design I and Design II are respectively

and

. If heat losses are neglected, and if both the designs are feasible, which of the following statements holds true?

Diagram for Chemical Engineering question 16

Your answerChoose one option.

and

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Producer gas is obtained by

Your answerChoose one option.

passing air through red hot coke

thermal cracking of naphtha

pasing steam through red hot coke

pasing air and steam through red hot coke

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2019 · Paper 1

Question 15

Question 16

Question 17