Question:
In group 15 elements which element shows a fractional oxidation state?
In group 15 elements which element shows a fractional oxidation state?
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Down Group 15: inert pair effect ↑ → mixed valency ↑ → fractional oxidation states possible.
Updated On: Apr 15, 2026
- N
- As
- Sb
- Bi
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The Correct Option is D
Solution and Explanation
Concept:
Fractional oxidation states arise from mixed valency.
Step 1: Tend in Group 15. Down the group, inert pair effect increases → +3 oxidation state becomes more stable.
Step 2: Behaviour of Bismuth. Bi shows +3 and +5 oxidation states, tendency to form mixed-valence compounds → fractional oxidation states.
Step 3: Conclusion. Bi most commonly shows fractional oxidation states.
Step 1: Tend in Group 15. Down the group, inert pair effect increases → +3 oxidation state becomes more stable.
Step 2: Behaviour of Bismuth. Bi shows +3 and +5 oxidation states, tendency to form mixed-valence compounds → fractional oxidation states.
Step 3: Conclusion. Bi most commonly shows fractional oxidation states.
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