(b) (i) Carry out the following conversions : (I) Propanone to Propane (II) Acetophenone to Benzoic acid (III) Benzyl chloride to Phenylethanoic acid (ii) Give a simple chemical test to distinguish between the following pairs of compounds : (I) Benzaldehyde and Phenol (II) Butanal and Butan-2-one