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p-Block Elements - I
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Borax on heating strongly above its melting point melts to a liquid, then solidifies to a transparent mass commonly known as Borax Bead. The transparent glassy mass consists of :
A
sodium pyroborate
B
boric anhydride
C
sodium metaborate
D
mixture of sodium metaborate and boric anhydride
Solution
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 boric anhydride and sodium metaborate. Boron trioxide is also formed instead of boric anhydride.
Option (D) is correct.
Standard 11
Chemistry
