Question:
Which of the following effects involves the delocalization of pi electrons in a molecule?
Which of the following effects involves the delocalization of pi electrons in a molecule?
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Delocalization of pi electrons or lone pairs across a conjugated system is the resonance effect.
Updated On: Nov 12, 2026
- Inductive effect
- Resonance effect
- Electromeric effect
- Hyperconjugation
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Different electronic effects move electrons in different ways.
Step 2: Compare the Effects
The inductive effect displaces sigma electrons along a chain.
The resonance effect delocalizes pi electrons or lone pairs through a conjugated system.
Hyperconjugation delocalizes sigma electrons of a C-H bond.
The electromeric effect is a temporary transfer of pi electrons.
Step 3: Compare the options
The effect that involves delocalization of pi electrons is the resonance effect, option (B).
Final Answer:
The resonance effect involves delocalization of pi electrons. \[ \boxed{\text{(B) }\text{Resonance effect}} \]
Different electronic effects move electrons in different ways.
Step 2: Compare the Effects
The inductive effect displaces sigma electrons along a chain.
The resonance effect delocalizes pi electrons or lone pairs through a conjugated system.
Hyperconjugation delocalizes sigma electrons of a C-H bond.
The electromeric effect is a temporary transfer of pi electrons.
Step 3: Compare the options
The effect that involves delocalization of pi electrons is the resonance effect, option (B).
Final Answer:
The resonance effect involves delocalization of pi electrons. \[ \boxed{\text{(B) }\text{Resonance effect}} \]
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