Electrophilic Substitution Reaction MCQ - Practice Questions with Answers

• The ortho, para positions of phenols are electron-rich in nature.
• Electrophile is electron deficient in nature. Thus, it tries to attack the position which is electron-rich.
• Thus, compounds like phenols etc are called ortho-para directing.
• The groups like Nitro-benzene are known as Meta-directing groups because they sent the electrophile to the meta position.

• -I effect only moves along sigma bond.
• -M effect/resonance effect is always more prevalent than -I effect.
• +M effect on the ring at 1 and 3 positions are equal in magnitude. But -I effect decreases as the distance increases.

Electrophile is electron deficient. Thus, it tries to go to the most electron-rich position.