Chemistry - Complete Pblock- Question with Solution | TestHub

Acidity is directly propotional to oxidation number. As the O.No. of$\mathrm{S},\mathrm{P }\mathrm{}\mathrm{}\mathrm{a}\mathrm{n}\mathrm{d }\mathrm{}\mathrm{}\mathrm{C}\mathrm{l}$in
${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_3,\mathrm{}\mathrm{}{\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_3$&$\mathrm{H}\mathrm{C}\mathrm{l}{\mathrm{O}}_3$is +4, +3 & +5 respectively so decreasing order of acidity will be$\mathrm{I}\mathrm{I}\mathrm{I}>\mathrm{I}>\mathrm{I}\mathrm{I}$.