Which of the following statements is not correct?

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The bond angle in ${NH}_{3}$ is greater than in ${NF}_{3}$

All ortho-substituted anilines are more basic than para-substituted anilines regardless of the electronic effect of the substituent

Amides are much weaker bases than amines

The increasing order of basicities of pyrrole, pyridine, and piperidine is pyrrole < pyridine < piperidine

answer is B.

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Detailed Solution

All ortho-substituted anilines are more basic than para-substituted anilines regardless of the electronic effect of the substituent statements is not correct.

Because it can give a single pair of electrons on nitrogen to organisms that are lacking in electrons, aniline is considered basic in nature.
On the basicity of aniline, the substituent has a significant impact. Aniline's basic strength is affected by both electron-donating and -withdrawing groups, with the former reducing aniline's basic strength.
O-nitro aniline, for instance, is less basic than aniline while o-methyl aniline is more basic.

Hence, option B is correct.

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