Question

How do complex compounds like Na₂ZnO_​2 and CaOCl₂ formed ?

Answer 1

Dear ​Adrish Vivek Sen,

1) Sodium zincate: Na₂ZnO₂ prepared when Zn or ZnO reacts with aq. NaOH

.$$\begin{gathered} Zn+H_{2}O+2NaOH\to N{a}_{2}Zn{O}_2+H_{2}O+H_2 \\ or \\ ZnO+H_{2}O+2NaOH\to N{a}_{2}Zn{O}_2+2H_{2}O \end{gathered}$$

2) Bleaching Powder: When chlorine gas reacts with dry slaked lime.

$Ca(OH{)}_2+C{l}_2\to Ca(OCl)Cl$
Regards