1.

Borax is coverted into crystalline boron by the following steps Borax overset("X")rarr H_(3)BO_(3)overset("Y")underset(Deltas)rarr B. X and Y are respectively

Answer»

HCl , Cu
HCl , C
C, Al
HCl, Al

SOLUTION :`Na_(2)B_4O_7+HClrarrNaCl+H_2B_4O_7urarrAlH_2O+Al_2O_3+B`


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