Give simple chemical tests to distinguish between the following pairs of compounds:
(i) Butanal and Butan-2-one
(ii) Benzoic acid and Phenol

Explanation

To distinguish between the given pairs of compounds, we can perform simple chemical tests. Here’s a step-by-step solution for each pair:

### (i) Distinguishing between Butanal and Butan-2-one

1. **Identify the Functional Groups**:
- Butanal is an aldehyde (RCHO).
- Butan-2-one is a ketone (RC(=O)R').

...