alleryWhich method is used to obtain pure metals from the impure metals got after reduction?
AElectrolysis
BRoasting
CCalcination
DLeaching
Answer & Solution
Correct answer: A. Electrolysis
1. Metals obtained by reduction still contain impurities.
2. These impurities must be removed to get pure metal, a step called refining.
3. The electrolysis (electrolytic) method is used for this refining.
4. Roasting and calcination are ore-treatment steps, not refining of the metal, so they are wrong.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 8 "Metallurgy", p.114_
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