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Question

The temporary effect in which there is a complete transfer of shared pair of π electrons to one of the atoms joined in a multiiple bond on the demand of an attacking reagent is called;

A
inductive effect
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B
electromeric effect
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C
hyper conjugation
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D
negative resonance effect
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Solution

The correct option is B electromeric effect
Electromeric effect. In electrophilic addition of alkenes, double bond is polarised in the presence of attacking reagent.
Example:

CH2=CH2+Br+CHδ+2CHδ2

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