Concept:The methoxy group (
−OCH3​) in anisole is an activating group that directs incoming substituents to the ortho and para positions of the benzene ring.
Explanation:Methoxybenzene is commonly called anisole, with the formula
C6​H5​OCH3​.
When anisole is treated with a nitrating mixture, which is a mixture of concentrated
HNO3​ and concentrated
H2​SO4​, the electrophile
NO2+​ is generated.
This electrophile attacks the benzene ring, which is activated by the electron-donating
−OCH3​ group through resonance.
The group directs the incoming nitro group mainly to the ortho and para positions, giving both 2-nitroanisole and 4-nitroanisole as products.
Among these, the para isomer is the major product because the ortho position suffers greater steric hindrance due to the nearby methoxy group.
Hence, the major product formed is 4-nitroanisole.
Answer:4-Nitroanisole, which is Option B.