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Oxidising Reagent and Reducing Reagent

Statement-I :...

Question

Statement-I : Leaching of gold with cyanide ion in absence of air/ $O_{2}$ 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.

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Solution

Leaching of gold with cyanide ion is done in presence of air/ $O_{2}$ leading to cyano complex $[A u (C N)_{2}]^{-}$ where Au is in $+ 1$ oxidation state.

Zinc is oxidised from $(0)$ to $+ 2$ oxidation state during displacement reaction carried out for gold extraction.

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