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.

Answer 1

Leaching of gold with cyanide ion is done in presence of air/$O_2$ leading to cyano complex $\left[Au\right(CN{)}_2{]}^{–}$ where Au is in $+1$ oxidation state.

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