A) Reduction of \[{{B}_{2}}{{O}_{3}}\]by mg.
B) Electrolysis of fused tetrafluoroborates (\[KB{{F}_{4}}\]) in molten KF.
C) Reduction of \[BC{{l}_{3}}\]with \[{{H}_{2}}\]at 1270 K.
D) thermal decomposition of boranes at 1173 K.
Correct Answer: C
Solution :
[c] Boron of maximum purity (~ 99.9%) is obtained by the reduction of \[BC{{l}_{3}}\]with \[{{H}_{2}}\] at 1270 K.
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