Statement-I : Leaching of gold with cyanide ion in absence of air/O2 leads to cyano complex of Au(III). Statement-II : Zinc is oxidized during the displacement reaction carried out for gold extraction. In the light of the above statements, choose the correct answer from the options given b

Question

Statement-I : Leaching of gold with cyanide ion in absence of air/O2 leads to cyano complex of Au(III). Statement-II : Zinc is oxidized during the displacement reaction carried out for gold extraction. In the light of the above statements, choose the correct answer from the options given below.

Accepted Answer

Statement-I is incorrect but statement-II is correct. Statement-I is incorrect because leaching of gold with cyanide requires oxygen to form the stable cyano complex of Au(I) or Au(III), while Statement-II is correct as zinc is indeed oxidized during the displacement reaction used in gold extraction.

Statement-I : Leaching of gold with cyanide ion in absence of air/O2 leads to cyano complex of Au(III). Statement-II : Zinc is oxidized during the displacement reaction carried out for gold extraction. In the light of the above statements, choose the correct answer from the options given below.

Solution

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