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Crystalline boron in small amounts may b...

Crystalline boron in small amounts may be obtained by:

A

reducing `BCl_(3)` with `H_(2)`

B

pyrolysis of `Bl_(3)`

C

thermal decomposition of diborane

D

all of these

Text Solution

Verified by Experts

The correct Answer is:
D
(a)`2BX_(3)+3H_(2)underset(" or Tantalum")overset("red hot W")to2B+6HX` , (`X=Cl` or `Br`)
(b)`2Bi_(3)underset(" or Tantalum")overset("red hot W") to 2B+3l_(2)` , (Van Arkel method)
(c )`B_(2)H_(6)overset(Delta)to2B+3H_(2)`
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