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A and B are functional isomers of compou...

A and B are functional isomers of compound `C_(3)H_(6)O`. On heating with `NaOH` and `I_(2)` isomer A froms yellow percipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.

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The functional isomers are `CH_(3)COCH_(3)[A]` and `CH_(3)CH_(2)CHO[B]`. The isomer [A] has a methyl ketonic group `(CH_(3)CO-)` and responds to iodoform test while the isomer [B] does not since this group is not present.
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