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Question

A compound X is obtained by the reaction of alkaline KMnO4 with another compound Y followed by acidification. Compound X also reacts with compound Y in presence of few drops of H2SO4 to form a sweet smelling compound Z. The compound X, Y and Z are respectively :

A
ethanol, ethene, ethanoic acid
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B
ethanoic acid, ethanol, ethylethanoate
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C
ethanoic acid, ethanal, ethene
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D
ethanol, ethanoic acid, sodium ethanoate
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Solution

The correct option is D ethanoic acid, ethanol, ethylethanoate
The characteristics of compound Z shows that it is an ester which is formed by reaction of an alcohol with reaction of a carboxylic acid in presence of conc. H2SO4, further X is formed by acidiflcation of Y. Hence, Y should be an alcohol and X a carboxylic acid. Hence, the reactions will be :
C2H5OH(Y)ethanolAlkaline−−−−KMnO4CH3COOH(X)ethanoic acid
C2H5OH(Y)+CH3COOH(X)Conc.−−−H2SO4CH3COC2H5Xethyl ethanoate+H2O

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