Chemistry · 2022
JEE Main · 25 June 2022, Shift 1 · Q64
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…
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 :
Official answer
(3)
$\displaystyle \left[\mathrm{Au}(\mathrm{CN})_2\right]^{-} \text {and }\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}$
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JEE Main 2022 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.