JEE Advanced Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Advanced

Not in JEE Main or NEET syllabus

The methods chiefly used for the extraction of lead and tin from their ores are respectively [IIT JEE 2004]

(A)Self reduction and carbon reductionCorrect
(B)Self reduction and electrolytic reduction
(C)Carbon reduction and self reduction
(D)Cyanide process and carbon reduction

Answer: (A)

Solution

Lead is extracted from galena (PbS) by self-reduction (auto-reduction): the sulphide is partly roasted to PbO, which then reacts with the remaining PbS: PbS + 2PbO \rightarrow 3Pb + SO_2. Tin is extracted from

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Question ID VK-159576