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An unknown compound, believed to be a hydrocarbon, showed the following behavior

ID: 763297 • Letter: A

Question

An unknown compound, believed to be a hydrocarbon, showed the following behavior: it burned with a yellow sooty flame; no heat or color appeared when sulfuric acid was added; permanganate solution remained purple; the red color of bromine soltion was lost only after a catalyst was added. . From the compounds below, circle the one that fits the observation. . Write equations for the tests that work CH3CH2CH2CH2CH3 (Cyclohexene) (Benzene) H_C triple bond C_CH2CH2CH3

Explanation / Answer

aromatic hydrocarbons burn with sooty flame. so benzene could be answer benzene doesnot react with H2SO4 , permanganate , Bromine solution, however benzene + Br2/catalyst like (FeBr3) ---> bromo benzene (thus decolurises bromine)

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