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Unit - 9.1 Occurrence of Carbon And Its Allotropic Forms — CHEMISTRY STD 8 — Question

ICSE BoardEnglish MediumSTD 8CHEMISTRYUnit - 9.1 Occurrence of Carbon And Its Allotropic Forms1 Mark
MCQ
When diamond is heated in vacuum for a very long time, it changes into:
  • ✓
    graphite
  • B
    charcoal
  • C
    lampblack
  • D
    carbon dioxide
✓

Answer

Correct option: A.
graphite
A

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