Write a note on oxides of group-$16$ elements.

(N/A) The elements of group-$16$ form oxides of type $EO_{2}$ and $EO_{3}$,where $E = S, Se, Te$ or $Po$.
$SO_{2}$ is a gas,while $SeO_{2}$ is a solid. $SO_{2}$ acts as a reducing agent,whereas $TeO_{2}$ acts as an oxidising agent.
The stability of $EO_{2}$ type oxides decreases down the group: $SO_{2} > SeO_{2} > TeO_{2}$.
The acidic character of $EO_{2}$ type oxides also decreases down the group: $SO_{2} > SeO_{2} > TeO_{2}$.
These elements also form oxides of type $EO_{3}$ (e.g.,$SO_{3}, SeO_{3}, TeO_{3}$). The acidic strength of these oxides decreases down the group: $SO_{3} > SeO_{3} > TeO_{3}$.