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Answer

Baeyer's reagent is an alkaline solution of cold potassium permanganate, which is a powerful oxidant making this a redox reaction. Reaction with double or triple bonds (-C=C- or -C≡C-) in an organic material causes the color to fade from purplish-pink to brown. It is a syn addition reaction. Aldehydes and formic acid (and formic acidesters) also give a positive test.

Answer

Baeyer's reagent, named after the German organic chemist Adolf von Baeyer, is used in organic chemistry as a qualitative test for the presence of unsaturation, such as double bonds. Baeyer's reagent is an alkalinesolution of cold potassium permanganate, which is a powerful oxidant making this a redox reaction.

Answer

1% alkaline KMnO4

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