1.

Identify the correct statement with respect to the following reaction. Zn_((s)) + 2[Au(CN)_(2)]_((aq))^(-) rarr [Zn(CN)_(4)]_(2(aq))^(-) + 2Au_((s)) (a) The above reaction takes place in extraction of zinc (b) Gold is reduced to its elemental state (c ) The process is called ammonia leaching. (d) The above reaction is an example of cyanide leaching.

Answer»

III & IV
II & IV
Only I
I, II, III & IV

Answer :B


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