Baeyer’s reagent is :
- Acidic potassium permanganate solution
- Acidic potassium dichromate solution
- Cold, dilute, aqueous solution of potassium permanganate
- Hot, concentrated solution of potassium permanganate
The Correct Option is C
Solution and Explanation
Baeyer's reagent, a cold, dilute, alkaline potassium permanganate (KMnO4) solution, serves as a potent oxidizing agent for detecting unsaturation (double or triple bonds) in organic compounds. The permanganate ion (MnO4-) exhibits a deep purple hue. Upon reaction with unsaturated compounds, this purple color dissipates, yielding a brown precipitate of manganese dioxide (MnO2). The disappearance of the permanganate's color signifies a positive test for unsaturation. Maintaining a cold and dilute solution is crucial to prevent overly vigorous reactions that could lead to further oxidation of the organic compound.
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