Which of the following statements about H3BO3 is not correct?

Which of the following statements about H3BO3 is not correct?

  1. A

    It is a strong tribasic acid.

  2. B

    It is prepared by acidifying an aqueous solution of borax.

  3. C

    It has a layer structure in which planar BO3 units are joined by hydrogen bonds.

  4. D

    It does not act as proton donor but acts as a Lewis acid by accepting a lone pair of electrons.

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    Solution:

    Instead of donating -OH group in solution, H3BO3 accepts -OH group from water. Therefore, it is weak monobasic.

    H3BO3+H2OB(OH)4-+H+

    Boric acid forms when borax is treated with an acid.

    Na2B4O7+2HCl+5H2O2NaCl+4H3BO3

    Boric acid has a layer-like structure in which each BO3 unit is combined with another BO3 through hydrogen bonding.

    B in H3BO3 is electron-deficient, therefore it acts as a weak Lewis acid that can accept a lone pair of electrons. This concludes that statement 1 is incorrect.

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