An unknown organic compound is found on elementalanalysis to contain 68.1% carbon, 13.7% hydrogen, and18.2% oxygen by mass. It is slightly soluble in water. Uponcareful oxidation it is converted into a compound thatbehaves chemically like a ketone and contains 69.7% carbon,11.7% hydrogen, and 18.6% oxygen by mass. Indicatetwo or more reasonable structures for the unknown.

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Alkynes

Alkynes are organic compounds that contain at least one triple bond between carbon-carbon atoms. They are a series of unsaturated compounds with a general molecular formula, CnH2n-2.