NEET 2016 Chemistry question

Which is the correct statement for the given acids?

(1)Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
(2)Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.Correct
(3)Both are triprotic acids
(4)Both are diprotic acids

Answer: (2)

Solution

Only the hydrogen atoms bonded to oxygen as P-OH are acidic. Phosphinic acid (hypophosphorous acid), , has one P-OH group and two P-H bonds, so it

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Question ID VK-091912