JEE Advanced Chemistry question

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

Not in JEE Main or NEET syllabus

Extraction of metals or other processes is through the complex formation. I. Cyanide process, II. Monds process, III. Photographic fixing process. Complexes formed in these methods are

(A), ,
(B), , Correct
(C), ,
(D), ,

Answer: (B)

Solution

The cyanide process extracts silver from its ore via Ag_2S + CN^- \rightarrow [Ag(CN)_2]^- (I). Mond's process purifies nickel via Ni + 4CO \rightarrow [Ni(CO)_4], decomposed later to pure nickel

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Question ID VK-160029