P-Block Elements Ques 527
Question: $ B{{(OH)}_3}+NaOH\to NaBO_2+Na[B{{(OH)}_4}+H_2O $ How can this reaction is made to proceed in forward direction?
Options:
A) addition of cis 1,2-diol
B) addition of borax
C) addition of trans 1,2-diol
D) addition of $ Na_2HPO_4 $
Show Answer
Answer:
Correct Answer: A
Solution:
$ H_3BO_3 $ acts as weak monobasic Lewis acid. $ B{{( OH )}_3}+NaOH\to Na[ B{{( OH )}_4} ] $ On addition of cis-1, 2-diol in $ H_3BO_3 $ solution, acidic strength of $ H_3BO_3 $ increases due to chelation effect.
