A)
B)
C)
D)
E) None of these
Correct Answer: B
Solution :
? Formula of borax is \[{{[{{B}_{4}}{{O}_{5}}{{(OH)}_{4}}]}^{2}},\] borax contains tetrahedral units of \[{{[{{B}_{4}}{{O}_{5}}{{(OH)}_{4}}]}^{2-}}\] ? Most important compound of boron.
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