All of the following react with KMnO4 but:
Correct answer: A. Ethane
- A. Ethane
- B. Ethyne
- C. Ethyl benzene
- D. Ethene
Explanation
Option A is correct as Alkanes are generally unreactive towards oxidizing reagents. Whereas Option B, C and D are incorrect as all of them react with KMnO4 due to unsaturation of bond ( for B and D) whereas ethyl benzene just has its outer alkyl chain oxidized to give benzoic acid as a product.
This question appeared on the HEC Phase I 2017 paper, which you can sit online with every answer explained.
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About Alkanes
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
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