Question

# A student warmed a neutral organic compound with some ethanoic acid and a little of concentrated sulphuric acid in a test-tube. He observed that vapours having sweet smell (fruity smell) are evolved. (a) What type of functional group is present in this organic compound? (b) Give the name and formula of one such organic compound.

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Solution

## (a) The functional group present in the organic compound is hydroxyl group. Fruity smell of the vapours produce indicates the presence of ester group. As ester is a result of condensation reaction between alcohol and carboxylic acids. (b) For example - ethanol reacts with ethanoic acid/carboxylic acid to produce ethyl ethanoate/ester which has a functional group $\left(—\mathrm{COO}\right)$. ${\mathrm{C}}_{2}{\mathrm{H}}_{5}\mathrm{OH}+{\mathrm{CH}}_{3}\mathrm{COOH}\stackrel{{\mathrm{H}}_{2}{\mathrm{SO}}_{{}^{4}}}{\to }\underset{\mathrm{Ethyl}\mathrm{ethanoate}}{{\mathrm{CH}}_{3}{\mathrm{COOC}}_{2}{\mathrm{H}}_{5}}+{\mathrm{H}}_{2}\mathrm{O}$

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