The element exhibiting the most stable $+2$ oxidation state among the following is

When $KI$ is reacted with $O_3$ under aqueous condition,the product formed is:

The correct statement$(s)$ about the oxoacids,$HClO_4$ and $HClO$,is(are):
$[A]$ $HClO_4$ is more acidic than $HClO$ because of the resonance stabilization of its anion.
$[B]$ $HClO_4$ is formed in the reaction between $Cl_2$ and $H_2O$.
$[C]$ The central atom in both $HClO_4$ and $HClO$ is $sp^3$ hybridized.
$[D]$ The conjugate base of $HClO_4$ is a weaker base than $H_2O$.

What is the number of oxygen atoms bonded to chlorine in its strongest oxoacid?

Arrange the hydrohalic acids $(HX)$ of halogens in increasing order of acidity.

When a few drops of concentrated $HCl$ are added to bleaching powder,which of the following is produced?