Inert Pair Effect
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About This Question
- Subject
- chemistry
- Chapter
- classification of elements and periodicity in properties
- Topic
- inert pair effect
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Group 13
The Inert Pair Effect refers to the reluctance of the outermost s-orbital electrons to participate in bonding in heavy p-block elements.
- It results in the preference for an oxidation state that is 2 units less than the group valency.
- It is most pronounced in Group 13 (B,Al,Ga,In,Tl).
- For Thallium (Tl), the +1 oxidation state is much more stable than the +3 state due to this effect.
This medium difficulty chemistry question is from the chapter classification of elements and periodicity in properties, covering the topic of inert pair effect. It appeared in the 2025 exam.
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