Distinction between pairs of compounds
Propanal `(CH_(3)CH_(2)CHO)` and Propanone `(CH_(3)COCH_(3))`
(a) By the use of Tollens' reagent and Fehling Solution.
(b) By iodoform test.

Explanation

To distinguish between propanal `(CH₃CH₂CHO)` and propanone `(CH₃COCH₃)`, we can use the following tests:

### (a) Distinction by Tollens' Reagent and Fehling's Solution

1. **Tollens' Reagent Test**:
- **Propanal (Aldehyde)**: Propanal is an aldehyde and will react with Tollens' reagent. When propanal is treated with Tollens' reagent, it reduces the silver ion (Ag⁺) to metallic silver, forming a silver mirror on the test tube. This is known as the "silver mirror test."
- **Propanone (Ketone)**: Propanone, being a ketone, does not react with Tollens' reagent. Therefore, it will not produce a silver mirror.

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