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Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 169 of 557.

Chemical Engineering MCQs

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An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii) ________?

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A.More number of trays are required but the residue composition remains unchanged
B.More number of trays are required and the residue composition is more dilute in methanol
C.Composition of the residue remains unchanged
D.Less number of trays are required
Explanation: The correct answer is Less number of trays are required.

Submitted by: Academy of Pakistan

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