Is it that for both E1 and E2 mechanisms order of reactivity is
3o > 2o > 1o carbocation
What are Sn ar and e1 cb reactions and how to identify or differentiate them from other mechanisms(Sn 1,Sn 2,E1,E2)?
How to know whether a reaction is following Sn1,Sn2,Sn ar,E1,E2 or E1cb mechanism?
please mention a way which does have any exceptions.