Assertion : $p$-Nitrophenol gives more electrophilic substituted compound than $m$ methoxyphenol. Reason :…
Assertion : $p$-Nitrophenol gives more electrophilic substituted compound than $m$ methoxyphenol.
Reason : Methoxy group shows only negative I-effect.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Solution
In $p$-nitrophenol, $-\mathrm{NO}_2$ 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 $\mathrm{O}$ ).
- $\mathrm{OCH}_3$ at meta-position shows only $-I$ effect but lesser than $-I$ effect of $-\mathrm{NO}_2$ group.