Question

B(OH)3 + NaOH $\rightarrow$ Na[B(OH)4] (aq).

Then addition of which of the following proceeds the reaction in the forward direction.

• A. Glecerol
• B. Mannitol
• C. Catachol
• D. Ethanol

Answer 1

Answer: (A)

Glecerol

Answer 2

cis-diols form very stable complex with [B(OH)4]–,

Thus removing it from solution

HB(OH)4 + 2 $\rightleftharpoons$

+ H+ + 4H2O.