In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A) : Toluene on Friedal Crafts methylation gives o– and p–xylene.
Reason (R) : CH3- group bonded to benzene ring increases electron density at o– and p– position.
(i) Both A and R are correct and R is the correct explanation of A.
(ii) Both A and R are correct but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct.
Correct option - (i)Both A and R are correct and R is the correct explanation of A.
•CH3 group in toluene increase the electron density at o- and p- position of benzene ring. Because CH3 group in toluene act as +M effect containing group so, if act as ortho and para directing group for upcoming electrophile.
•Friedal Craft methylation is an electrophilic substitution reaction on benzene ring.
•Hence electrophile attacks at o- and p- postion of benzene ring.
