Question

formula of sodium zincate and sodium aluminate?

Answer 1

Sodium zincate : H4Na2O4Zn
Sodium aluminate : NaAlO2

Answer 2

Hi there!

♦ Sodium Zincate :  $Na_{2}ZnO_{2}$

!! Reaction !!

$Zn$ + $2NaOH$ → $Na_{2}ZnO_{2}$ + $H_{2}O$

♦ Sodium Aluminate : $NaAlO_{2}$

!! Reaction !!

$2Al$ + $2NaOH$ + $2H_{2}O$ → $2NaAlO_{2}$ + $3H_{2}$

[ Thank you! for asking the question. ]
Hope it helps!