JEE Advanced 2014 Chemistry question

The correct statement(s) for orthoboric acid is/are

(A)It behaves as a weak acid in water due to self ionization.
(B)Acidity of its aqueous solution increases upon addition of ethylene glycol.Correct
(C)It has a three dimensional structure due to hydrogen bonding.
(D)It is a weak electrolyte in water.Correct

Answer: (B),(D)

Solution

is a weak monobasic Lewis acid: it accepts from water, ; it does not ionise by itself giving (A false). Being only slightly ionised, it is a weak electrolyte (D true). Ethylene glycol (a cis-diol) forms a

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Question ID VK-026271