(a) How will you convert the following:
(i) Propanone to Propan-2-o1
(ii) Ethanal to 2-hydroxy propanoic acid
(iii) Toluene to benzoic acid
(b) Give simple chemical test to distinguish between:
(i) Pentan-2-one and Pentan-3-one
(ii) Ethanal and Propanal

Explanation

### Step-by-Step Solution

#### Part (a): Conversion of Compounds

1. **Conversion of Propanone to Propan-2-ol:**
- **Reagent:** Sodium borohydride (NaBH4) or lithium aluminum hydride (LiAlH4) can be used for the reduction.
- **Reaction:** Propanone (CH3C(=O)CH3) is treated with NaBH4 in an alcohol solvent.
- **Product:** The product formed is Propan-2-ol (CH3CHOHCH3).
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