Q.

Which of the following compound will most easily be attacked by an electrophile                    [2024]

1  
2  
3  
4  

Ans.

(4)

Reactivity of benzene ring towards an electrophile is directly proportional to electron density on the ring.
–OH exerts more electron density on the ring than the given groups CH3 and Cl and therefore make more appropriate to electrophilic attack.