Question

Boron of highest purity $\left(\sim99.9\%\right)$ is obtained by

• A. reduction of $B_{2}O_{3}$ by Mg
• B. electrolysis of fused tetrafluoroborates $(KBF_{4})$ in molten $KF$
• C. reduction of $BCl_{3}$ with $H_{2}$ at $1270 \,K$
• D. thermal decomposition of boranes at $1173 \,K$

Answer 1

Answer: (C)

Boron of maximum purity $\left(\sim99.9\%\right)$ is obtained by the reduction of $BCl_{3}$ with $H_{2}$ at $1270\,K$