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 Find the number of tetrahedral and trigonal planar units in structure of A -

Answer»

2,1
2,2
2,4
5,2

ANSWER :B


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