Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) ORES & Method of Concentration Single Correct MCQ
Published on: August 13, 2026

Process of heating ore in air to remove sulphur is :

A
calcination
B
roasting
C
zone refining
D
liquation

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Verified by Experts
The correct answer is:
B

Roasting is a process of heating the concentrated ore (generally sulphide ore) strongly in the excess of air or O 2 below its melting point. During roasting impurities of As, Sb, P and S escape as their volatile oxides.

S (s) + O 2 (g) — → SO 2 (g)

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