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Q.

 B(OH)3+NaOH⇌Na[B(OH)4]
The reaction can be made to proceed in forward direction?
I. By addition of  Question Image  II. By addition of ethylene glycol  Question Image
 

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a

Only II

b

Both I and II

c

Only I

d

None of these

answer is C.

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Detailed Solution

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I) Lack of vicinal diols.
II) On adding ethylene glycol, they form complexing species with orthoboric acid.  Question Image
 

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 B(OH)3+NaOH⇌Na[B(OH)4]The reaction can be made to proceed in forward direction?I. By addition of    II. By addition of ethylene glycol