Types OF attacking reagents, electrophile

The attacking reagent in electrophilic sulphonation of benzene is

Introduction To Reaction Mechanism|Substrate And Reagent|Attacking Reagent|Electrophiles|Nucleophiles|Questions|Summary

Which of the following compounds will be most easily attacked by an electrophile ?

Which of the following compounds will be most easily attacked by an electrophile?

Types OF Reactions||electrophile|| Nucleophile and Free radical Reaction

In nitration of benzene , attacking electrophile is