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:

"Stay in the loop. Receive exam news, study resources, and expert advice!"
Chemistry Part II Textbook for Class XI
Page No. : 355
Line : 8
Among top 100 Universities Globally in the Times Higher Education (THE) Interdisciplinary Science Rankings 2026
Last Date to Apply: 18th May | Ranked #43 among Engineering colleges in India by NIRF | Highest Package 1.3 CR , 100% Placements
Recognized as Institute of Eminence by Govt. of India | NAAC ‘A++’ Grade | Upto 75% Scholarships
NAAC A+ Accredited | Among top 2% Universities Globally (QS World University Rankings 2026)
NAAC A++ Grade | Highest Package-30 LPA | 400+ Recruiters
NAAC A++ Grade | Recognized as Category-1 Deemed to be University by UGC | 41,000 + Alumni Imprints Globally
Explore on Careers360
Student Community: Where Questions Find Answers