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Give chemical tests to distinguish between the following pairs of compounds :

(i) Methyl acetate and ethyl acetate.

(ii) Benzaldehyde and benzoic acid.

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(i) Methyl acetate and ethyl acetate :-

Ethylacetate is hydrolysed slowly by water to form ethyl alcohol while methyl acetate gives methyl alcohol.

The hydrolysis product of ethyl acetate undergo iodoform test with iodine and alkali.

(ii) Benzaldehyde and benzoic acid :-

Benzaldehyde when treated with ammoniacal silver nitrate gives silver mirror.

Benzoic acid reacts with sodium bicarbonate to liberate CO2.

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