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$B$ can be obtained from halide by van-Arkel method. This involves reaction
Options:
- A
- B
- C Both (a) and (b)
- D None of the above
Solution:
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The correct answer is:
According to Van-Arkel method, pyrolysis of $\mathrm{BI}_{3}$ is carried out in the presence of red hot $\vec{W}$ or Ta filament.
$2 \mathrm{BI}_{3} \stackrel{\text { Red hot w or Ta filament }}{\longrightarrow} 2 \mathrm{~B}+3 \mathrm{I}_{2}$
$2 \mathrm{BI}_{3} \stackrel{\text { Red hot w or Ta filament }}{\longrightarrow} 2 \mathrm{~B}+3 \mathrm{I}_{2}$
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