Which of the following group(s) activate the benzene ring towards electrophilic substitution reaction.

Which of the following froups groups deactivates the benzene ring towards electrophilic substitution ?

Which of the following substituents deactivates the benzene ring towards electrophilic substitution?

Which of the following is less reactive than benzene towards electrophilic substitution reaction ?

All the common m-directig group make the benzene ring towards electrophilic substitution reactions

Explain the fact that in aryI alkyl ether, the alkoxy group activates the benzene ring towards electrophilic substitution.

Explain the fact that in aryl alkyl ethers the alkoxy group activates the benzene ring towards electrophilic substitution.