Distinguish between the following pairs of compounds using the test given within the brackets.
Calcium sulphite and calcium carbonate (using dil. HCI)

Explanation

To distinguish between calcium sulphite (CaSO3) and calcium carbonate (CaCO3) using dilute hydrochloric acid (HCl), we can follow these steps:

### Step 1: Write the chemical equations for the reactions.
1. **Calcium Carbonate with Dilute HCl**:
\[ \text{CaCO}_3 + 2 \text{HCl} \rightarrow \text{CaCl}_2 + \text{CO}_2 + \text{H}_2\text{O} \]
- When calcium carbonate reacts with dilute HCl, it produces calcium chloride, carbon dioxide gas, and water.
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