Arrange the following alkene in increasing order of reactivity towards addition reaction with HCI.

Arrange the following alkene in increasing order of reactivity towards

1.	Arrange the following alkene in increasing order of reactivity towards addition reaction with HCI.
Answer» `IV lt III lt I lt II` `I lt II lt IV lt III` `I lt IV lt II lt III` `III lt I lt IV lt II` Solution : III is most reactive as it FORMS most stable aromatic CARBOCATION. Il is second most reactive as it forms second most stable, benzylic carbocation. IV forms tertiary carbocation, more reactive than I.