Draw the structure and the name of the product when the following alcohols are oxidised. Assume that the excess of oxidising agent is used. (i) Butan-

The oxidation is generally carried with `KMnO_(4)` or `K_(2)Cr_(2)O_(7)` acidified with `H_(2)SO_(4)`.
(i) `underset("Butan-1-ol")(CH_(3)CH_(2)CH_(2)CH_(2)OH) overset("oxidation")(rarr) underset("Butanoic acid")(CH_(3)CH_(2)CH_(2)COOH)`
(ii) `underset("But-2-en-1-ol")(CH_(3)CH=CHCH_(2)OH) overset("oxidation")(rarr) underset("Ethanoic acid")(CH_(3)COOH)+underset("Ethanedioic acid")(HOOC COOH)`
(iii) `underset("2-Methylpropan-1-ol")(CH_(3)underset(CH_(3))underset(|)(CH)CH_(2)OH) overset("oxidation")(rarr) underset("2-Methylpropanoic acid")(CH_(3)underset(CH_(3))underset(|)(CH)COOH)`