Define roasting. | Filo
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Class 12

Chemistry

Metallurgy

General Principles and Processes of Isolation of Elements

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Define roasting.

  1. Heating of sulphide ores in the presence of excess air to convert them into oxides
  2. Heating of carbonate ores in the limited supply of air to convert them into oxides
  3. Heating of oxides of metals to turn them into metal
  4. Heating of carbonate ores in the limited supply of air to convert them into sulphide
Correct Answer: Option(a)
Solution: Ores found in the form of sulphide and carbonates are first converted to their oxides by the process of roasting and calcination. Heating of sulphide ores in the presence of excess air to convert them into oxides is known as roasting.
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general principles and processes of isolation of elements