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Which of the following statements about H3BO3 is not correct?

1. It is a strong tribasic acid
2. It is prepared by acidifying an aqueous solution of borax
3. It has a layer structure in which planar BO3 units are joined by hydrogen bonds
4. It does not act as proton donor but acts as a Lewis acid by accepting a lone pair of electrons

Correct answer: It is a strong tribasic acid

Solution

H3BO3 (boric acid) is a weak monobasic acid, not a strong tribasic acid. It acts as a Lewis acid by accepting electron pairs rather than donating protons.

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