Oxidation States Halogens
Maximum oxidation state shown by chlorine is:
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About This Question
- Subject
- chemistry
- Chapter
- p-block elements
- Topic
- oxidation states halogens
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
+7
- Valence Shell: Chlorine (Cl) has the outer configuration 3s23p5.
- Availability of d-orbitals: Unlike Fluorine, Chlorine has vacant 3d orbitals.
- Excitation: By promoting its s and p electrons to the d orbitals, it can have up to 7 unpaired electrons.
- Maximum State: This leads to a maximum oxidation state of +7 (e.g., in perchloric acid HClO4 or Cl2O7).
- Contrast: Fluorine is restricted to −1 because it lacks vacant d-orbitals.
This easy difficulty chemistry question is from the chapter p-block elements, covering the topic of oxidation states halogens. It appeared in the 2025 exam.
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