JEE Main Chemistry question

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

Not in JEE Main or NEET syllabus

Match the extraction process listed in column I with metals listed in column II.

Column I A. Self reduction B. Carbon reduction C. Complex formation and displacement by metal D. Decomposition of iodide

Column II (P) Lead (Q) Silver (R) Copper (S) Boron

(A)A-P,R; B-R,Q; C-P; D-S,Q
(B)A-P,R; B-P,R; C-Q; D-SCorrect
(C)A-P,R; B-S; C-P; D-P,Q
(D)A-P,Q; B-R,P; C-Q; D-S

Answer: (B)

Solution

Self-reduction and carbon reduction both apply to lead and copper at different stages of their extraction (e.g. PbS+2PbO\to 3Pb+SO_2 and Cu_2S+2Cu_2O\to 6Cu+SO_2 for self-reduction; carbon-based reduction steps also feature in their metallurgy), silver

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Question ID VK-145351