# But-2-ene on reaction with alkaline $KMnO_{4}$ at elevated temperature followed by acidification will give:Option 1) $2$ molecules of $CH_{3}COOH$Option 2)$2$ molecules of $CH_{3}CHO$Option 3)one molecule of $CH_{3}CHO$ and one molecule of $CH_{3}COOH$Option 4)

Oxidation of alkene -

Alkene on reaction with cold dilute aqueous solution of KMnO4 (Bayers Reagent) produce vicinal glycol. Decolourisation  of KMnO4 solution is used as a test of unsaturation.

- wherein

$CH_{3}-CH=CH-CH_{3}$       $\xrightarrow[\triangle]{KMnO_{4}}$

$2CH_{3}-COOH$ $\overset{[0]}{\leftarrow}$ $2CH_{3}-CHO$

$\therefore$ option (1) is correct

Option 1)

$2$ molecules of $CH_{3}COOH$

Option 2)

$2$ molecules of $CH_{3}CHO$

Option 3)

one molecule of $CH_{3}CHO$ and one molecule of $CH_{3}COOH$

Option 4)

Exams
Articles
Questions