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Question: Dilute aqueous \(KMnO_{4}\), at room temperature reacts with \(\ R - CH = CH - R\)to give....

Dilute aqueous KMnO4KMnO_{4}, at room temperature reacts with  R−CH=CH−R\ R - CH = CH - Rto give.

A

R – CHO

B

R – COOH

C

RCHOH – CHOHR

D

CO2+H2OCO_{2} + H_{2}O

Answer

RCHOH – CHOHR

Explanation

Solution

R−CH=CH−R→dil. aqueous KMnO4room temp.R−CH∣OH−CH∣OH−R(Alcohol)R - CH = CH - R\underset{\text{room temp.}}{\overset{\quad\text{dil. aqueous }KMnO_{4}\quad}{\rightarrow}}\underset{(\text{Alcohol})}{R - \underset{\begin{aligned} & | \\ & OH \end{aligned}}{CH} - \underset{\begin{aligned} & | \\ & OH \end{aligned}}{CH} - R}

R−CH=CH−R→Conc. KMnO4heatR−COOH+R−COOHR - CH = CH - R\underset{\text{heat}}{\overset{\quad\text{Conc. }KMnO_{4}\quad}{\rightarrow}}R - COOH + R - COOH.