Which one of the following does not have an allotrope?

Question

Which one of the following does not have an allotrope?

1. A. Oxygen
2. B. Sulphur
3. C. Nitrogen (Correct answer)
4. D. Carbon

Correct Answer

Option C — Nitrogen

Detailed Solution & Explanation

The correct answer is Nitrogen.

Key Points

• Nitrogen (N₂) does not have well-known natural allotropes under normal conditions.
• Carbon has allotropes: diamond, graphite, fullerene, graphene.
• Oxygen has allotropes: O₂ (dioxygen) and O₃ (ozone).
• Sulphur has many allotropes including rhombic and monoclinic sulphur.
• Allotropes are different structural forms of the same element.