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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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By Expert Faculty of Sri Chaitanya
a
Sodium metaborate and boric anhydride
b
Boric anhydride
c
Sodium metaborate
d
Sodium pyroborate

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detailed solution

Correct option is A

Sodium metaborate and boricanhydride mixture is said to be "transparent glassy bead".The formation of "transparent glassy bead" is due to the formation of  Sodium metaborate and boricanhydride mixture.


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