Out of the following substituents, how many are classified as activating groups towards electrophili — Aromatic Hydrocarbons Chemistry Question

💡 Solution & Explanation

Activating groups increase the electron density of the benzene ring compared to benzene itself. In the provided list, $-OH$, $-CH_3$, and $-OCH_3$ are activating groups. The remaining groups ($-NO_2, -CN, -Cl, -CF_3$) are deactivating groups (note that while $-Cl$ is an $o/p$ director, it is still a deactivator).