Write chemical reactions to effect the following transformations :
(i) Butan-1-ol to butanoic acid
(ii) Benzyl alcohol to phenylethanoic acid
(iii) 3-Nitrobromobenzene to 3-nitrobenzoic acid
(iv) 4-Methylacetophenone to benzene-1, 4-dicarboxylic acid
(v) Cyclohexene to hexane-1, 6-dioic acid   
(vi) Butanal to butanoic acid

Arrange the following in decreasing order of their acidic strength. Give explanation for the arrangement.
C₆H₅COOH, FCH₂COOH, NO₂CH₂COOH.

Compound 'A' was prepared by oxidation 'B' with alkaline KMnO₄.  Compound 'A' on reduction with lithium aluminium hydride gets converted back to compound 'B'.  When compound 'A' is heated with compound B in the presence of H ₂SO₄ it produces fruitly smell of compound C to which family the compounds 'A', 'B' and 'C' belong to?

What product will be formed on reaction of propanal with 2-methylpropanal in the presence of NaOH?  What products will be formed?  Write the name of the reaction also.

A compound 'A' with molecular formula C₅H₁₀O gave positive 2, 4-DNP test but a negative Tollen's reagent test.  It was oxdised to carboxylic acid 'B' with molecular formula C₃H₆O₂ when treated with alkaline KMnO₄ under vigorous condition.  Sodium salt of 'B' gave a hydrocarbon 'C' on Kolbe's electrolytic reduction.  Identify A, B and C and write the chemical equations for the reaction.

Give chemical tests to distinguish between the following pairs of compounds:
(i) Propanoyl chloride and Propanoic acid
(ii) Benzaldehyde and Acetophenone