JEE Main Chemistry question

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

Not in JEE Main or NEET syllabus

Pb and Sn are extracted from their chief ores by:

(A)Carbon reduction and self reductionCorrect
(B)Self reduction and auto reduction
(C)Electrolysis and self reduction
(D)Self reduction and electrolysis

Answer: (A)

Solution

Lead is obtained from galena () by partial roasting to , followed by the "self-reduction" reaction 2PbO + PbS \rightarrow 3Pb + SO_2, while tin is obtained from cassiterite () by reduction with carbon (coke) in a furnace, $ + 2C → Sn +

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Question ID VK-138923