With respect to hypochlorite, chlorate and perchlorate ions, choose the correct statement(s).

Hypochlorite ion : ClO^Θ

Chlorate ion : ClO₃^Θ

Per chlorate ion : ClO₄^Θ

1) $\text{ Acidic order: }\stackrel{+1}{\mathrm{HClO}}<\stackrel{+5}{{\mathrm{HClO}}_3}<\stackrel{+7}{{\mathrm{HClO}}_4}$

Conjugate base order : ClO^–> ClO₃^–> ClO₄^– 

In chlorate ion bond angle changes due to presence of lone pair on chlorine atom. While hypochlorite ion is linear and perchlorate ion is tetrahedral and there is no effect of lone pair on hypochlorite ion

(C) Disproportionation reaction of

$\text{ (i) hypochlorite ion : }3{\mathrm{ClO}}^{\ominus }\to 2{\mathrm{Cl}}^{-}+{\mathrm{ClO}}_3^{\theta }$

$\text{ (ii) Chlorate ion }:4{\mathrm{ClO}}_3^{\circ }\to 3{\mathrm{ClO}}_4^{\ominus }+{\mathrm{Cl}}^{\ominus }$

$\text{ (D) }{\mathrm{ClO}}^{-}+{\mathrm{SO}}_3^{2-}\to {\mathrm{SO}}_4^{2-}+{\mathrm{Cl}}^{\mathrm{B}}$