Aqua-regia reacts with $Pt$ to yield

Which one of the following orders is not in accordance with the property stated against it?

Draw the molecular formula and structure of perbromic acid.

In the manufacture of bromine from sea water,the mother liquor containing bromides is treated with:

Oxygen reacts directly with all of the following elements except:

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 $H_2O$.