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Aqueous solution of orthoboric acid can ...

Aqueous solution of orthoboric acid can be titrated against sodium hydroxide using phenolphthalein indicator only in presence of :

A

trans-glycerol

B

catechol

C

cis-glycerol

D

both (B) and (C )

Text Solution

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The correct Answer is:
D
It forms a stable cyclic complex with polyhydroxy compounds like cis-glycerol, cathechol, etc. This helps in the release of `H^+` as `H_3O^+` and , therefore, boric acid acts as a strong acid and hence can be titrated with sodium hydroxide using phenolphthalein.
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