# Is there a formation of carbocation in both elimination reactions, E1 and E2?

No, a carbocation is formed only in $E 1$eliminations.
In an $E 1$ elimination, the leaving group departs first to form an intermediate carbocation. Then a base attacks a β hydrogen in the carbocation to form the alkene.
In an $E 2$ elimination, the leaving group departs at the same time as the base attacks.
At no time does a carbocation form in an $E 2$ elimination.