Q.

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

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a

orthoboric acid is obtained by acidifying an aqueous solution of borax

b

orthoboric acid does not act as a proton donor but acts as a Lewis acid by accepting hydroxyl ion

c

orthoboric acid is obtained along with H2 gas when diborane is hydrolysed 

d

when orthoboric acid is strongly heated, the residue left is boric anhydride

answer is A, B, C, D.

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Detailed Solution

H3BO3Strong heatingB2O3

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