Multiple choice

Which of these is not a carbon allotrope?

  1. buckminsterfullerene

  2. Sand

  3. Diamond

  4. Graphite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Allotropes are different physical forms of the same element. Buckminsterfullerene, diamond, and graphite are all forms of pure carbon, whereas sand is primarily silicon dioxide.

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