Halogen Reactivity
Fluorine is most reactive halogen due to:
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About This Question
- Subject
- chemistry
- Chapter
- p-block elements
- Topic
- halogen reactivity
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Lowest bond dissociation energy and high electronegativity
- Anomalous Low Bond Energy: The F2˘013F bond dissociation enthalpy is surprisingly low (even lower than Cl2˘013Cl).
- Electronic Repulsion: This is because Fluorine atoms are very small, and the lone pairs on the two F atoms are very close together, leading to intense inter-electronic repulsion that weakens the bond.
- Oxidizing Power: Fluorine has the highest reduction potential (+2.87 V) due to its small size and extremely high electronegativity, making it a violent oxidizing agent.
- Reaction Energy: Reactions involving Fluorine are highly exothermic because the bonds Fluorine forms with other atoms are typically much stronger than the weak F2˘013F bond.
This easy difficulty chemistry question is from the chapter p-block elements, covering the topic of halogen reactivity. It appeared in the 2025 exam.
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