Question

Which of the following is the most reactive in aromatic electrophilic substitution reaction?

• A. Benzene
• B. Chlorobenzene
• C. Phenol
• D. Benzaldehyde
• E. Nitrobenzene

Hint:

Electron-donating groups such as -OH and -NH\(_2\) increase the electron density on the ring, making it more reactive in electrophilic aromatic substitution reactions.

Answer 1

The Correct Option is C

In aromatic electrophilic substitution reactions, the electron-donating groups increase the reactivity of the aromatic ring towards electrophiles. Among the options, phenol has the most reactive ring due to the electron-donating effect of the hydroxyl group (-OH). 
Thus, the correct answer is (C).