Which of the following compounds is consumed during the preparation of `Na_(2)CO_(3)` by Solvay's process?

Options

A. `NH_(3), CaCO_(3), NaCl`
B. `NH_(3), CaO, NaCl`
C. `CaCO_(3), NaCl`
D. `NaCl, NH_(4)HCO_(3)`

Answer

To determine which compound is consumed during the preparation of sodium carbonate (Na₂CO₃) by the Solvay process, we can follow these steps:

### Step 1: Understand the Solvay Process
The Solvay process is a method used to produce sodium carbonate from sodium chloride (NaCl) and calcium carbonate (CaCO₃).

### Step 2: Identify the Reactants and Products
The main reaction in the Solvay process can be summarized as follows:
\[ \text{NaCl} + \text{CaCO}_3 \rightarrow \text{Na}_2\text{CO}_3 + \text{CaCl}_2 \]
In this reaction:
- Sodium chloride (NaCl) is a reactant.
- Calcium carbonate (CaCO₃) is also a reactant.
- Sodium carbonate (Na₂CO₃) is the product formed.
- Calcium chloride (CaCl₂) is another product formed.

### Step 3: Analyze the Options
We need to identify which of the given compounds is consumed (used up) in the process. The compounds mentioned in the options are:
1. NH₃
2. CaCO₃
3. NaCl

From the reaction, we see that both NaCl and CaCO₃ are consumed to produce Na₂CO₃ and CaCl₂.

### Step 4: Conclusion
Among the options, both NaCl and CaCO₃ are consumed in the reaction. However, since the question asks for a single compound, we can conclude that:
- **CaCO₃ (Calcium Carbonate)** is one of the compounds consumed during the preparation of Na₂CO₃ by the Solvay process.

### Final Answer
The compound consumed during the preparation of Na₂CO₃ by the Solvay process is **CaCO₃ (Calcium Carbonate)**.

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