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Identify the true/false statement about orthoboric acid
I. It has a layer structure in which planar $B O_{3}$ units are joined by hydrogen bonds.
II. It is a weak monobasic acid and a Lewis acid
III. On heating it forms metaboric acid and on further heating to red hot, forms boric oxide .
IV. It is obtained by reacting aqueous solution of borax with HCl
Select the correct option.

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I-T, II-T,I II-T, IV-T

I-F, II-T,I II-T, IV-F

I-F, II-T,I II-T, IV-T

I-F, II-F,I II-T, IV-T

answer is B.

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Detailed Solution

Statements I, II ,III & IV are true, borax form orthoboric acid on treating with HCl

On the addition of mineral acid to an aqueous solution of borax, the following compound is formed :

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