Question

Boron can be obtained by:
A. reduction of `B_(2)O_(3)` by `C`.
B. reduction of `BCl_(3)` with `H_(2)` at `1270k`.
C. thermal decomposition of boron halides at `1173 k`.
D. electrolytic reduction of `KBF_(4)` in `KF` at `1073 k`.

Answer 1

Correct Answer - B::C::D
(B)`2BCl_(3)+3H_(2)overset(1270 K)to 2B+6HCl`
( C)`2BCl_(3)overset(1173 K)toB+3Cl_(2)`
(D)`K^(+)[BF_(4)]^(-) overset(1073 K) hArr K^(+)+[BF_(4)]^(-)`
`[BF_(4)]^(-) + e^(-) to B +2F_(2)` (At anode)
`K^(+) + e^(-) to K` (At cathode)