1.

underset(("Hydrated salt"))((A)) underset("heated")overset("Storngly")tounderset("glassy bead")underset("transparent")ubrace(B+C) H_(3)BO_(3) underset("heated")overset("Strongly")toC+D Identify C-

Answer»

`(BN)_(X)`
`NaPO_(3)`
`B_(2)O_(3)`
`Mg(NH_(4))PO_(4)`

ANSWER :C


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