This is a series of chemical reactions involving copper hydroxide $Cu(OH)2$, copper nitrate $CuOHNO3$, zinc nitrate $Zn(NO3)2$, and sodium zincate $Na2ZnO2$.

Cu$OH$2 → CuOHNO3: Copper hydroxide reacts with nitric acid $HNO3$ to form copper nitrate.

CuOHNO3 → Cu$NO3$2: Copper nitrate undergoes a double displacement reaction to form copper$II$ nitrate.

Cu$NO3$2 → Zn$NO3$2: Copper$II$ nitrate reacts with zinc metal $Zn$ to form zinc nitrate and copper metal $Cu$.

Zn$NO3$2 → Na2ZnO2: Zinc nitrate reacts with sodium hydroxide $NaOH$ to form sodium zincate.

Overall, the series of reactions results in the transformation of copper hydroxide into sodium zincate via copper nitrate and zinc nitrate intermediates.