Select whether the following statement is True or False:

The oxides of hard metal or the transition metals oxides like oxides of copper, zinc, iron and chromium do not dissolve in water.

What are amphoteric oxides? Give an example.

The metals which can form amphoteric oxides with oxygen are:

Write down the changes that will be seen in each instance and explain the reason behind it.

Zinc oxide was added to dilute $\mathrm{HCl}$ and zinc oxide was added to dilute $\mathrm{NaOH}$.