Explain the nature of 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 oxidizing agent.
The stability of these oxides decreases down the group.
Stability order: $SO_2 > SeO_2 > TeO_2$.
Acidic strength order: $SO_2 > SeO_2 > TeO_2$.
These elements also form oxides of type $EO_3$ (e.g.,$SO_3, SeO_3, TeO_3$).
The acidic strength of $EO_3$ type oxides also decreases down the group.
Acidic strength order: $SO_3 > SeO_3 > TeO_3$.