Choose the correct option using the code regarding roasting…

Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) ORES & Method of Concentration Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

Choose the correct option using the code regarding roasting process.

(I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide.

(II) It is an exothermic process.

(III) It is used for the concentration of sulphide ore.

(IV) It removes easily oxidisable volatile impurities present in the concentrated ore.

I, II and III

I, II and IV

I, III and IV

I, II, III and IV

Text Solution

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The correct answer is:

Ore is heated below its melting point in a reverberatory furnace in the presence of air to convert it into its oxides. It removes easily oxidisable volatile impurities like arsenic as As 2 O 3 , antimony as Sb 2 O 3 and sulphur as SO 2 . Roasting is an exothermic process; once started it does not require additional heating.

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