Boric acid is an acid because its molecule

Question 72 Boric acid is an acid because its molecule:

A) accepts OH negative ion from water releasing proton
B) Combines with proton from water
C) containes replaceable H positive ion
D) gives up a proton

Answer: accepts OH negative ion from water releasing proton

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Explanation by reaction :
B(OH)₃ + H₂O  B(OH)−
4 + H⁺

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