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  • The correct order of acidic strength is:Option: 1 <img alt="\mathrm{HClO}_{4}>\mathrm{HClO}_{3}>\mathrm{HClO}_{2}>\mathrm{HClO}" src="https:

The correct order of acidic strength is:

Option: 1

\mathrm{HClO}_{4}>\mathrm{HClO}_{3}>\mathrm{HClO}_{2}>\mathrm{HClO}


Option: 2

\mathrm{HClO}_{3}>\mathrm{HBrO}_{3}>\mathrm{HIO}_{3}


Option: 3

\mathrm{H}_{3} \mathrm{PO}_{2}>\mathrm{H}_{3} \mathrm{PO}_{3}>\mathrm{H}_{3} \mathrm{PO}_{4}


Option: 4

All of these


Answers (1)

best_answer

Generally, oxoacids in which the central atom is in higher oxidation state are stronger acid but in case of oxoacids of phosphorous the order is just reversed because in \mathrm{H}_{3} \mathrm{PO}_{2} only one ionizable -OH group is present and two and three -\mathrm{OH} group in \mathrm{H}_{3} \mathrm{PO}_{3} and \mathrm{H}_{3} \mathrm{PO}_{4} respectively. Since in \mathrm{H}_{3} \mathrm{PO}_{4} , one \mathrm{-OH} group is there, it has higher tendency to release \mathrm{H}^+ than \mathrm{PO}_{3} and \mathrm{H}_{3} \mathrm{PO}_{4}.

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Pankaj

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