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Question

Question: When ortho boric acid (H3BO3) is heated the residue left is :...

When ortho boric acid (H3BO3) is heated the residue left is :

A

Boron

B

Metaboric acid

C

Boric anhydride

D

Borax

Answer

Boric anhydride

Explanation

Solution

2H3BO3Δ(redhot)\overset{\quad\Delta(redhot)\quad}{\rightarrow}B2O3 + 3H2O