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Question

Roasting is defined as:



A

Heating of sulphide ores in presence of air.

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B

Heating of sulphide ores in absence of air.

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C

Heating of carbonate ores in presence of air.

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D

Heating of carbonate ores in absence of air.

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Solution

The correct option is A

Heating of sulphide ores in presence of air.


Roasting is a process in metallurgy in which a sulphide ore is heated in air. The process may convert a metal sulphide to a metal oxide or to a free metal. 
Example: Roasting ZnS may yield ZnO; roasting HgS may yield free Hg metal.​


Chemistry

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