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Organic Nitrogen Compounds — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12ChemistryOrganic Nitrogen Compounds2 Marks
Question
Aniline gets coloured on standing in air for a long time. Why?
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Answer

Due to strong electron - donating effect (+ R effect) of $NH _2$ group, the electron density on the benzene ring increases. As a result, aniline is easily oxidised on standing in air for a long time to form coloured products.

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