6 Questions around this concept.
The interaction between $\pi$ bond and lone pair of electrons present on an adjacent atom is responsible for :
It is a temporary effect. The organic compounds having a multiple bond (a double or triple bond) show this effect in the presence of an attacking reagent only. It is defined as the complete transfer of a shared pair of π-electrons to one of the atoms joined by a multiple bond on the demand of an attacking reagent.
The effect is annulled as soon as the attacking reagent is removed from the domain of the reaction. It is represented by E.
In this effect the π−electrons of the multiple bond are transferred to that atom to which the reagent gets attached. For example:

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Chemistry Part II Textbook for Class XI
Page No. : 355
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