Chemical Process
Roasting of metallurgical ores is done mainly to

Sinter the ore
Remove arsenic & sulphur
Dehydrate it
Remove CO₂ & H₂O

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Chemical Process
Shaving soaps are

Soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property
None of these
High free alkali soaps having excess of cane sugar and alcohol
Metalic soaps compounded with frothing agents

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