GATE CH 2025 Paper 1 — page 10

Questions 28–30 of 65. Imported answers require review unless explicitly marked reviewed.

In the CONTACT PROCESS for manufacturing sulphuric acid, the reaction converting

Your answerChoose one option.

Exothermic and reversible

Endothermic and reversible

Exothermic and irreversible

Endothermic and irreversible

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Choose the option that correctly matches the items in Group 1 with those in Group 2.

Group 1	Group 2
(P) Coking	(I) Prolonged exposure of catalyst to high temperature
(Q) Poisoning	(II) Deposition of carbonaceous material on catalyst surface
(R) Sintering	(III) Irreversible chemisorption of molecules on active sites of catalyst

Your answerChoose one option.

(P) – (III), (Q) – (I), (R) – (II)

(P) – (II), (Q) – (III), (R) – (I)

(P) – (II), (Q) – (I), (R) – (III)

(P) – (I), (Q) – (III), (R) – (II)

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Which of the following statements regarding multiple effect evaporators is/are TRUE?

Your answerSelect all correct options. You can choose more than one.

The pressure of the effect with fresh steam is the lowest for both forward feed and backward feed.

Backward feed is preferred over forward feed for cold feed.

Backward feed is preferred over forward feed for highly viscous concentrated product.

The temperature of the effect with fresh steam is the lowest for both forward feed and backward feed.

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2025 · Paper 1