[In acidic (strong) medium...] Nitration of aniline in strong acidic medium also gives m-nitroaniline because

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Nitration of aniline in strong acidic medium also gives m-nitroaniline because

In absence of substituents nitro group always goes to m-position.

In electrophilic substitution reactions amino group is meta directive.

Inspite of substituents nitro group always goes to only m-position.

In acidic (strong) medium aniline is present as anilinium ion.

Explanation:

$-N^\oplus H_3$ is m-directing, hence besides para (51%) and ortho (2%), meta product (47%) is also formed in significant yield.

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