Chemistry-
General
Easy
Question
Pb and Sn are extracted from their chief ore by
- Carbon reduction and self reduction.
- Self reduction and carbon reduction.
- Electrolysis and self reduction.
- Self reduction and electrolysis.
The correct answer is: Self reduction and carbon reduction.
& 
get reduced by PbS itself which is already present in mixture so because the reduction took place by mixture itself, hence is known as self reduction.
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