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  4. Hydrocarbon 'A' reacts with KMnO4 under neutral conditions at room temperature to form only a diketone, <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-7nycr7s3pl6m.png /> . The hydrocarbon is

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Q. Hydrocarbon 'A' reacts with $KMnO_{4}$ under neutral conditions at room temperature to form only a diketone, Question . The hydrocarbon is

NTA AbhyasNTA Abhyas 2020Hydrocarbons

Solution:

Since diketone is produced, therefore, the hydrocarbon must be an alkyne. The structure of diketone shows that triple bonded carbons are $-C^{3}\equiv C^{4}-$ . Hence, the alkyne is $CH_{3}CH_{2}C\equiv CCH_{2}CH_{2}CH_{3}.$

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