Question

Predict which compound in each of the following pair is more reactive with $HCl$ styrene or $p-$nitro styrene:

• A. Styrene
• B. $p-$nitro styrene
• C. Both doesn't react
• D. None of these

Answer 1

Answer: (A)

Styrene

Styrene is more reactive towards electrophilic addition with $HCl$ than $p-$nitro styrene. In $p-$nitrostyrene, the electron withdrawing nitro group decreases the electron density by $-I$ effect.