Chemistry - Complete Pblock- Question with Solution | TestHub

Xenon trioxide$\left(\mathrm{X}\mathrm{e}{\mathrm{O}}_3\right)$forms xenate ion in alkaline medium.
$\mathrm{X}\mathrm{e}{\mathrm{O}}_3+\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}\to \mathrm{N}\mathrm{a}\left[\mathrm{H}\mathrm{X}\mathrm{e}{\mathrm{O}}_4\right]$
But the xenate ions slowly disproportionate in alkaline solution as
$\mathrm{N}\mathrm{a}\left[\mathrm{H}\mathrm{X}\mathrm{e}{\mathrm{O}}_4\right]+\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}\to \mathrm{Z}+\mathrm{X}\mathrm{e}+{\mathrm{O}}_2+{\mathrm{H}}_2\mathrm{O}$
The compound$\mathrm{Z}$is expected to be