Write chemical reaction to affect the following transformations :
(i) Butan-1-ol -> Butanoic acid
(ii) Benzyl alcohol to pheynylethanoic acid
(iii) 3-Nitrobromobenzene to 3-nitrobenzoic acid
(iv) 4-methylacetophenone to Terephthalic acid
(v) Cyclohexene -> Hexane-1, 6 dioic acid
(vi) Butanal -> Butanoic acid
