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  4. Borax on heating strongly above its melting point melts to a liquid which then solidifies to a transparent mass commonly known as borax bead. The transparent glassy mass consists of

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Q. Borax on heating strongly above its melting point melts to a liquid which then solidifies to a transparent mass commonly known as borax bead. The transparent glassy mass consists of

The p-Block Elements

Solution:

$\underset{\text{Borax}}{Na_2B_4O_7.10H_2O} \xrightarrow[-10H_2O]{\text{Heat}}\underset{\text{Sodium metarborate}}{2NaBO_2}+ \underset{\text{Boric anhydride}}{ B_2O_3}$