Question

Which one of the following statements about $H_{3}B{O}_3$ is not correct?

• A. It is a strong tribasic acid.
• B. It is prepared by acidifying an aqueous solution of borax.
• C. It has a layer structure in which planar BO, units are joined by hydrogen bonds.
• D. It does not act as proton donor as it acts as a Lewis acid by accepting hydroxyl ions.

Answer 1

Answer: (A)

It is a strong tribasic acid.

1. It is not a tribasic acid.

Option A is incorrect for $H_{3}B{O}_3$.

2. Aqueous solution, instead of donating the $-OH$ group it breaks the $H-OH$ bond of water and accepts the $-OH$ group from it leaving in the solution hence it is mono basic acid.