Chemistry - CHEMICAL BONDING Question with Solution | TestHub

${\mathrm{H}}_3{\mathrm{Te}}^{+}<{\mathrm{H}}_3{\mathrm{Se}}^{+}<{\mathrm{H}}_3{\mathrm{S}}^{+}<{\mathrm{H}}_3{\mathrm{O}}^{+}$

They all have pyramidal shape. As electro negativity of central atom decreases, bond angle decreases.