Action of Alkalis on Metal Oxides and Metal Hydroxides

Balance the following equation:
$\mathrm{PbO}+\mathrm{NaOH} \stackrel{400°\mathrm{C}}{\to } {\mathrm{Na}}_2{\mathrm{PbO}}_2+{\mathrm{H}}_2\mathrm{O}$.

What happens when Lead oxide reacts with Sodium hydroxide?

When lead reacts with oxygen,it forms _____ .

What happens when lead reacts with oxygen?

Which of the following is an amphoteric oxide?

_____ is an amphoteric oxide.$\left(\mathrm{Zinc} \mathrm{oxide}/\mathrm{MgOH}\right)$

Balance the following equation.
$\mathrm{ZnO}\left(\mathrm{S}\right)+ \mathrm{HCl}\left(\mathrm{l}\right) \to {\mathrm{ZnCl}}_2\left(\mathrm{aq}\right) + {\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

Balance the following equation.
$\mathrm{ZnO}\left(\mathrm{S}\right)+\mathrm{NaOH}\left(\mathrm{aq}\right)\to {\mathrm{Na}}_2{\mathrm{ZnO}}_2\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$.

Zinc oxide is said to have amphoteric nature, but sodium oxide is not because

Zinc oxide is treated with sodium hydroxide solution. The product will be

Zinc on reaction with $\mathrm{NaOH}$ gives a salt $\left(\mathrm{A}\right)$ along with a gas $\left(\mathrm{X}\right)$ and $\left(\mathrm{A}\right)$ on reaction with a gas $\left(\mathrm{Y}\right)$ gives white precipitate $\left(\mathrm{W}\right)$. Which of the following is correct?

The compound which reacts with both $\text{HCl}$ and $\text{NaOH}$ is

Which of the following dissolves in a hot concentrated solution of $\mathrm{NaOH}$?