Which one of the following does not have an allotrope?
- AOption (a)
Oxygen
- BOption (b)
Sulphur
- COption (c)
Nitrogen
- DOption (d)
Carbon
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Correct answer
Nitrogen
Why this answer is correct
The Correct answer is Nitrogen.
Key Points
- Nitrogen does not have allotropes.
- An allotrope refers to different structural forms of the same element in the same physical state. For example, Carbon exists as allotropes such as diamond, graphite, and graphene.
- However, Nitrogen exists primarily as a diatomic molecule (N2) under standard conditions and does not form other molecular structures or allotropes.
- This is because of the strong triple bond between the two nitrogen atoms in N2, which makes it highly stable and less likely to form other allotropes.
- The diatomic nitrogen molecule is a key component of the Earth's atmosphere, constituting approximately 78% of its composition.
- Nitrogen is essential in various biological processes, such as the formation of amino acids, DNA, and RNA, but its lack of allotropes distinguishes it from other elements.
Additional Information
- Oxygen
- Oxygen has multiple allotropes, including dioxygen (O2) and ozone (O3).
- Ozone is an important allotrope that forms a protective layer in the atmosphere, shielding the Earth from harmful ultraviolet radiation.
- Sulphur
- Sulphur exhibits several allotropes, such as rhombic sulphur and monoclinic sulphur.
- These allotropes differ in their crystal structures and stability under specific temperature and pressure conditions.
- Carbon
- Carbon is well-known for its diverse allotropes, including diamond, graphite, graphene, fullerenes, and carbon nanotubes.
- These allotropes exhibit a wide range of physical and chemical properties, making carbon one of the most versatile elements.