NEET2011ChemistryGeneral Organic ChemistryActual
Assertion : p -Nitrophenol gives more electrophilic substituted compound than m methoxyphenol. Reason : Methoxy group shows only negative I-effect.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
D. If both assertion and reason are false.
Step-by-step solution
In p -nitrophenol, - NO ₂ group has -I effect, as a result of which electron density decreases on the benzene ring, hence reactivity towards electrophilic substitution decreases. Methoxy group shows both +R (due to lone pair of electrons on O ) and -I effect (due to greater electronegativity of O ). - OCH ₃ at meta-position shows only -I effect but lesser than -I effect of - NO ₂ group.