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Assertion : $p$-Nitrophenol gives more electrophilic substituted compound than $m$ methoxyphenol.
Reason : Methoxy group shows only negative I-effect.
Options:
Reason : Methoxy group shows only negative I-effect.
Solution:
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Verified Answer
The correct answer is:
If both assertion and reason are false.
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.
- $\mathrm{OCH}_3$ at meta-position shows only $-I$ effect but lesser than $-I$ effect of $-\mathrm{NO}_2$ group.
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