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TS EAMCET · Chemistry · p Block Elements (Group 13 & 14)

When orthoboric acid \(\left(\mathrm{H}_3 \mathrm{BO}_3\right)\) is subjected to strong heating, the residue left is

  1. A diborane
  2. B boron
  3. C boric anhydride
  4. D borax
Verified Solution

Answer & Solution

Correct Answer

(C) boric anhydride

Step-by-step Solution

Detailed explanation

On strong heating of orthoboric acid \(\left(\mathrm{H}_3 \mathrm{PO}_3\right)\) first breaks up into metaboric acid \(\left(\mathrm{HBO}_2\right)\) and \(\mathrm{H}_2 \mathrm{O}\). On further heating the metaboric acid breaks up into boric oxide…