Name the raw materials that are required for the manufacture of washing soda by Solvay process. Describe the chemical reactions involved in the process.

Explanation

### Step-by-Step Solution:

1. **Identify the Raw Materials:**
The raw materials required for the manufacture of washing soda (sodium carbonate, Na2CO3) by the Solvay process are:
- Sodium Chloride (NaCl)
- Water (H2O)
- Ammonia gas (NH3)
- Limestone (Calcium Carbonate, CaCO3)
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