Q. Which of the following species does not exert a resonance effect ?

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$C _{6} H _{5} NH _{3}{ }^{+}$

$C _{6} H _{5} NH _{2}$

$C _{6} H _{5} Cl$

$C _{6} H _{5} OH$

Solution:

In $C _{6} H _{5} NH _{3}{ }^{+}$, there is no lone pair of electrons on nitrogen atom. Hence it can not show resonance.

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