p-Block Elements-I - Result Question 37
8. $B(OH) _3+NaOH \rightleftharpoons NaBO _2+Na\left[B(OH) _4\right]+H _2 O$
How can this reaction is made to proceed in forward direction?
(2006, 3M)
(a) Addition of cis $1, 2$ -diol
(b) Addition of borax
(c) Addition of trans $1, 2$-diol
(d) Addition of $Na _2 HPO _4$
Show Answer
Answer:
Correct Answer: 8. (a)
Solution:
- Orthoboric acid is a very weak acid, direct neutralisation does not complete. However, addition of cis-diol allow the reaction to go to completion by forming a stable complex with $\left[B(OH) _4\right]^{-}$as:
BETA
