Multiple choice general knowledge

Diamond is an allotropic form of

  1. germanium

  2. carbon

  3. silicon

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

Diamond and graphite are both pure carbon allotropes - same element, different atomic arrangements. In diamond, each carbon atom bonds tetrahedrally to four others in a rigid 3D lattice, making it the hardest natural substance. Graphite has layered hexagonal sheets with weak interlayer forces, making it soft and slippery - ideal for pencil lead.

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