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Identify Unknown Compound with Iodoform Test and Baeyer Reagent

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An unknown compound burned with a yellow, nonsmoky flame and was found to be insoluble in 5% sodium hydroxide solution but soluble in concentrated sulfuric acid. Measurement of its boiling point gave a range of 130-131 degrees C. Combustion analysis gave a molecular formula of C5H8O. It was found to give a semicarbazone with a melting point of 204-206 degrees C., however, it gave a negative result when treated with Tollens reagent and it did not decolorize the Baeyer reagent. It also gave a negative iodoform test. Identify the unknown compound.

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The expert identifies unknown compounds with Iodoform test and Baeyer Reagents.

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