MHT CET 2025 Chemistry question

What is the product obtained when alkene is reacted with cold and dilute alkaline potassium permanganate?

(A)Alkanol
(B)GlycolCorrect
(C)Glycerol
(D)Alkanoic acid

Answer: (B)

Solution

Cold, dilute, alkaline (Baeyer's reagent) adds two -OH groups across the C=C bond by syn-hydroxylation, giving a vicinal diol (glycol): R-CH=CH_2 \xrightarrow{cold,\ dil.\ alk.\ KMnO_4} R-CH(OH)-CH_2OH; the purple

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Question ID VK-102981