MCQ
Correct order of basic strength is:
- A$iii > i > iv > i$
- B$iv > iii > ii > i$
- ✓$iii > ii > i > iv$
- D$iii > i > ii > iv$
✓
Answer
Correct option: C.
$iii > ii > i > iv$
c
$(i)$ The $+ I$ effect shown by methyl group increases the basic strength of the following compound.
$(i)$ The $+ I$ effect shown by methyl group increases the basic strength of the following compound.
$(ii)$ The $+ M$ effect of $- OCH _{3}$ group increases the basic strength of the following compound. $+ M$ effect of $- OCH _{3}$ is greater than $+ I$ effect of $- CH _{3}$
$(iii)$ Among the given options, the following compound is the most basic as the $- NH _{2}$ group does not involve in the resonance.
$(iv)$ Among the given options, the following compound is the least basic as - $NH _{2}$ group is involved in the resonance.
Thus, the correct order of basic strength is
$iii > ii > i > iv$
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