MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryHydrocarbonsPhysical & Chemical Properties of Alkynes
1-butyne on oxidation with hot alkaline KMnO4 would yield
A.CH3CH2CH2COOH
B.CH3CH2COOH
C.CH3CH2COOH + CO2 + H2O✓ Correct
D.CH3CH2COOH + HCOOH
Explanation
Reaction of given compound with alkaline permanganate solution as follows: 3 2 4 3 2 2 2 CH – CH – C CH KMnO CH CH COOH CO H O -> This reaction gives propanoic acid as oxidation product. 2 2 3 2 4 4 2 H O HgSO /H SO C H X CH CHO. -> 3 H C – C CH 3 3 H C – C C – CH 2 2 H C CH 3 3 H C – CH H3C CH2 C CH H3C CH2 C CH2 Cl HCl C Cl Cl H3C CH2 CH2 + HCl HYDROCARBONS 17
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