Select the correct statement(s) about the oxoacids and oxoanions of chlorine.

AThe oxidation state of chlorine in $HClO X_{2}$ is $+ 3$ .
BIn $HClO X_{3}$ the chlorine atom has three bond pairs and one lone pair, so the three oxygen atoms are arranged pyramidally around it.
C $ClO X_{2} X^{-}$ is linear.
D $ClO X_{4} X^{-}$ is tetrahedral.

Answer: A, B, D

A, B and D are correct:

ClO X_{4} X^{-}

has four bond pairs and no lone pair,

HClO X_{3}

has three bond pairs and one lone pair at Cl, and

+ 1 + x - 4 = 0

gives

x = + 3

. C is wrong, as

ClO X_{2} X^{-}

has two bond pairs and two lone pairs at Cl, so it is bent.