GATE Chemical Engineering Study Materials, Notes 2024-2025 - 1

Question: 1

Tower diameter may be decreased by

(A) increasing the liquid flow rate

(B) increasing the vapour flow rate

(C) using higher reflux ratio

(D) use of increased tray spacing

Question: 2

A binary mixture of benzene and cyclohexane is separated by

(A) extractive distillation

(B) solvent extraction

(C) ordinary distillation

(D) flash vaporisation

Question: 3

The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives

(A) high pressure drop and high hold up

(B) low pressure drop and low hold up

(C) high pressure drop and low hold up

(D) low pressure drop and high hold up

Question: 4

Flash distillation is suitable for the separation of components

(A) which form minimum boiling azeotrope

(B) having very wide boiling points

(C) which form maximum boiling azeotrope

(D) having very close boiling points

Question: 5

Rose oil is extracted from rose leaves using _____ distillation.

(A) steam

(B) extractive

(C) low pressure

(D) high pressure