GATE 2025 CH Q28, Chemical Technology: The correct answer is A, Exothermic and reversible | ChemeGate

Home/Practice Tests/PYQ Archive/Chemical Technology

GATE 2025 Chemical Engineering, Q28 · Chemical Technology

The correct answer is A, Exothermic and reversible.

Question

In the CONTACT PROCESS for manufacturing sulphuric acid, the reaction converting $SO₂$ to $SO₃$ is

A. Exothermic and reversible
B. Endothermic and reversible
C. Exothermic and irreversible
D. Endothermic and irreversible

Official answer: Exothermic and reversible

Why

GATE 2025 official key: (A). Catalytic oxidation of $SO₂$ to $SO₃$ over $V₂O₅$ is exothermic and reversible, which is why the process uses staged conversion with intermediate cooling to shift equilibrium favorably.

Explanation cross-checked for consistency. Final answer matches the official IIT answer key.

Chemical Technology Topic Guide →More Chemical Technology PYQs →Take the Full GATE 2025 Test →