Chemistry - Complete d-block Question with Solution | TestHub

(i)$\text{Z}\text{n}+2\text{N}\text{a}\text{O}\text{H}\to \text{N}{\text{a}}_2\text{Z}\text{n}{\text{O}}_2+{\text{H}}_2$
(ii)$4\text{A}\text{u}+8\text{N}\text{a}\text{C}\text{N}+{\text{O}}_2+2{\text{H}}_2\text{O}\to 4\text{N}\text{a}\left[\text{A}\text{u}{\left(\text{C}\text{N}\right)}_2\right]+ 4\text{N}\text{a}\text{O}\text{H}$
(iii)$\begin{array}{ccccccccc}\text{C}\text{u}& +& 4\text{H}\text{N}{\text{O}}_3& \to & \text{C}\text{u}{\left(\text{N}{\text{O}}_3\right)}_2& +& 2\text{N}{\text{O}}_2& + \mathrm{ 2}{\text{H}}_2\text{O}& \\ & & \left(\text{conc.}\right)& & & & & & \end{array}$
(iv) Formation of passive layer of$\text{F}{\text{e}}_2{\text{O}}_3$on the surface of Fe and$\text{N}{\text{O}}_2$gas is evolved.
$\text{F}\text{e}+4\text{H}\text{N}{\text{O}}_3\to \text{F}\text{e}{\left(\text{N}{\text{O}}_3\right)}_3+\text{N}{\text{O}}_2+\frac{1}{2}{\text{O}}_2$