Draw the structure of compound `(A)` having molecular formula `C_(5)H_(10)O` on the basis of following characteristics:
(a) If `(A)` gives iodoform test and forms isobutyric acid salt and iodoform.
(b) If `(A)` does not reduce Tollen's reagent but gives iodoform test and forms salt of `n`-Butyric acid.

Explanation

(a) `(A)` is `3`-Methylbutan-`2`-one.
`underset(3-"Methylbutan-2-one")(CH_(3)COCH(CH_(3))_(2))overset(I_(2)+KOH)rarrunderset("Iodoform")(CHI_(3)+(CH_(3))_(2))underset("Isobutyric acid salt")(CHCOOK)`
(b) `(A)` Should be Methyl ketone
`underset("Pentan-2-one " " (A)")(CH_(3)COCH_(2)CH_(2)CH_(3))overset(I_(2)+NaOH)rarrunderset("salt of n-butyric acid")(CHI_(3)+CH_(3)CH_(2)CH_(2)COONa)`