JEE Main 25 June 2022 Shift 1 Solved Paper

Section: Chemistry

Question : 64 of 90

Marks: +1, -0

Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with zinc forms the elemental gold and another complex [B]. [A] and [B], respectively are :

[25-Jun-2022-Shift-1]

[Au(CN)4]−and [Zn(CN)2(OH)2]2−
[Au(CN)2]−and [Zn(OH)4]2−
[Au(CN)2]−and [Zn(CN)4]2−
[Au(CN)4]2− and [Zn(CN)6]4−

Validate

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