Give two chemical tests to distinguish between benzaldehyde and benzoic acid.

Explanation

To distinguish between benzaldehyde (C6H5CHO) and benzoic acid (C6H5COOH), we can perform two chemical tests: the Sodium Bicarbonate (NaHCO3) test and the Tollens' reagent test. Here’s a step-by-step solution:

### Step 1: Sodium Bicarbonate Test
1. **Procedure**: Add a small amount of benzaldehyde and benzoic acid separately to a solution of sodium bicarbonate (NaHCO3).
2. **Observation**:
- **For Benzoic Acid**: When benzoic acid is added to NaHCO3, it reacts to produce sodium benzoate, carbon dioxide (CO2), and water (H2O). This reaction will produce brisk effervescence due to the release of CO2 gas.
- Reaction:
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