On heating ortho-boric acid to red hot, the residue is

Boron

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Metaboric acid

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Boron oxide

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Borax

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Solution

The correct option is C Boron oxide
$H_{3} B O_{3} 100^{\circ} C - -- \to H B O_{2} 160^{\circ} C - -- \to H_{2} B_{4} O_{7} R e d H o t - ---- \to B_{2} O_{3}$

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Similar questions

(H_{3} B O_{3})

When orthoboric acid is heated to red heat the residue is

(H_{3} B O_{3})

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