GATE 2019 MT – Question 22

Mineral Processing and Extractive Metallurgy · Ironmaking · 1 mark · Multiple choice

Which is the Boudouard (carbon gasification) reaction?

C(s) + ½O₂(g) → CO(g)
C(s) + O₂(g) → CO₂(g)
C(s) + CO₂(g) → 2CO(g)
CO(g) + ½O₂(g) → CO₂(g)

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Show answer and explanation

Correct answer: (C) C(s) + CO₂(g) → 2CO(g)

Explanation

The Boudouard equilibrium interconverts solid carbon, carbon dioxide and carbon monoxide: C+CO₂⇌2CO. Its forward direction gasifies carbon and generates CO reducing gas. Thus C; the other choices are direct oxidation reactions with oxygen.

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