JEE Main Chemistry question

There is very little difference in acid strength among the oxoacids of phosphorus (, , ) because:

(A)Phosphorus in these acids exists in different oxidation states
(B)The hydrogens in these acids are not all bound to phosphorus, and the ionisable – groups each have the same number of non-protonated () oxygens adjacent to themCorrect
(C)Phosphorus is a highly electronegative element
(D)Phosphorus oxides are less basic

Answer: (B)

Solution

Although , and have phosphorus in the , and oxidation states respectively, not all of their hydrogens are bonded to phosphorus — some are non-ionisable – bonds. Each acid's ionisable – group(s) sit next to the same number of

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Question ID VK-146243