1.

A carbonyl compound A having molecular formula C_5H_10 Oforms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

Answer»

Solution :(i) `UNDERSET("(Pentan - 2 - ONE)")(CH_3-CH_2-CH_2-undersetoverset(||)(O)(C ) - CH_3) overset(NaHSO_3)(to) underset("(White crystalline precipitate)")(CH_3-CH_2-CH_2 - undersetoverset(|)(OSO_2Na)oversetunderset(|)(OH) ) `
(ii) Pentan - 2 - one gives positive iodoform test, but it does not reduce Fehling.s solution.
(iii) Hence carbonyl COMPOUND A having molecular formula `C_5H_10 O`is pentan - 2 - one.
`underset("2-pentanone")(CH_3-CH_2 - CH_2 = undersetoverset(||)(O)(C ) - CH_3)`


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