Q.1. The most reactive among the following towards sulphonation is:

(a) Toluene          (b) Chlorobenzene        (c) Nitrobenzene            (d) m-Xylene

I can't understand why the answer given is (b)

 

Q.2. Which of the following is the most reactive towards ring nitration?

(a) Benzene           (b) Mesitylene            (c) Toluene           (d) m-Xylene

 

Q.3. Benzene + Ozone --------->  Y, Y is:

(a) Benzene monoozonide            (b) benzene diozonide             (c) benzene triozonide          (d) All of the above