In general all non metal oxides are _____ nature

1) Metal oxides are having basic nature when dissolve in water

Ex: ${\mathrm{Na}}_2\mathrm{O}+{\mathrm{H}}_2\mathrm{O}\to 2\mathrm{NaOH}[\mathrm{Sodium}\hspace{0.17em}\mathrm{hydroxide}]$

2) Non-metal oxides are having acidic nature when dissolves in water.

Ex: ${\mathrm{SO}}_3+{\mathrm{H}}_2\mathrm{O}\to \underset{\left[\mathrm{ACID}\right]}{{\mathrm{H}}_2{\mathrm{SO}}_4}[\mathrm{Sulphuric}\hspace{0.17em}\mathrm{acid}]$