When orthoboric acid is heated,the residue le | vedclass

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(C) On heating orthoboric acid $(H_3BO_3)$ at $373 \ K$,it loses a water molecule to form metaboric acid $(HBO_2)$.$H_3BO_3 \xrightarrow{373 \ K} HBO_

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Boric anhydride

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(C) On heating orthoboric acid $(H_3BO_3)$ at $373 \ K$,it loses a water molecule to form metaboric acid $(HBO_2)$.$H_3BO_3 \xrightarrow{373 \ K} HBO_2 + H_2O$On further heating at higher temperatures,it loses more water to form boric anhydride $(B_2O_3)$.$2HBO_2 \xrightarrow{\Delta} B_2O_3 + H_2O$Thus,the final residue left is boric anhydride $(B_2O_3)$.

When orthoboric acid is heated,the residue left is ...

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