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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements1 Mark
MCQ
Crystalline boron in small amounts may be obtained by :
  • A
    Reducing $\mathrm{BCl}_3$ with $\mathrm{H}_2$
  • B
    pyrolysis of $\mathrm{BI}_3$
  • C
    thermal decomposition of diborane
  • ✓
    all of these
✓

Answer

Correct option: D.
all of these
Crystalline boron is obtained by reducing volatile boron halides with hydrogen at high temperatures. Ultrapure boron for use in semiconductor industry is produced by the decomposition of diborane at high temperature and then purified with the zone melting process.

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