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Question:

Which of the correct statement for the given acids?

Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.

Both are diprotic acids.

Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.

Both are triprotic acids.

Solution:

Phosphinic acid is a monoprotic acid as it contains one P−OH bond while phosphonic acid is a diprotic acid as it contains two P−OH bonds.