All of the following react with KMnO4 except
Correct answer: A. Ethane
- A. Ethane
- B. Ethyne
- C. Ethylbenzene
- D. Ethene
Explanation
Alkanes cannot be oxidized; rather they can be oxidized only when burned in the presence of O2 to give carbon dioxide and water. Only option A is an alkane.
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About Alkenes
Alkenes are unsaturated hydrocarbons containing a carbon-carbon double bond with sigma and pi components and restricted rotation. Their reactions include electrophilic addition of hydrogen, halogens, hydrogen halides and water, with Markovnikov orientation, oxidation, combustion and polymerisation, while their preparation commonly involves elimination from alkyl halides or alcohols.
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