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  4. When borax is heated strongly, it gives

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Q. When borax is heated strongly, it gives

UPSEEUPSEE 2010

Solution:

Borax, when heated strongly, gets converted into a glassy bead, called borax bead, which is a mixture of sodium metaborate and boric anhydride.

$Na _{2} B _{4} O _{7} \cdot 10 H _{2} O \stackrel{\Delta}{\longrightarrow } Na _{2} B _{4} O _{7}+10 H _{2} O$

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