Which of the following groups is meta directing in electrophilic aromatic substitution?

A $- NO X_{2}$
B $- NH X_{2}$
C $- CH X_{3}$
D $- OH$

Answer: A

The nitro group withdraws electrons by both -I and -M effects and destabilises the arenium ions from ortho and para attack more than that from meta attack, so it is meta directing. -OH, -CH3 and -NH2 are ortho/para directors.

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Which of the following groups is meta directing in electrophilic aromatic substitution?

Answer: A

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