In the preparation of sodium carbonate `(Na_(2)CO_(3))` which of the following is used as raw material?

Options

A. Slakedlime
B. Lime stone
C. Quick lime
D. Sodium hydroxide

Answer

To determine the raw material used in the preparation of sodium carbonate (Na₂CO₃), we can follow these steps:

### Step 1: Understand the Question
The question asks for the raw material used in the preparation of sodium carbonate (Na₂CO₃).

### Step 2: Identify the Options
The options provided are:
1. Slaked lime (Ca(OH)₂)
2. Limestone (CaCO₃)
3. Quicklime (CaO)
4. Sodium hydroxide (NaOH)

### Step 3: Recall the Preparation Method
Sodium carbonate is commonly prepared using the Solvay process. This process involves the reaction of sodium chloride (brine) and limestone.

### Step 4: Analyze Each Option
- **Slaked Lime (Ca(OH)₂)**: This is not used in the Solvay process.
- **Limestone (CaCO₃)**: This is a key raw material in the Solvay process.
- **Quicklime (CaO)**: This is produced from limestone but is not directly used in the Solvay process.
- **Sodium Hydroxide (NaOH)**: This is not a raw material for the production of sodium carbonate in the Solvay process.

### Step 5: Conclusion
Based on the analysis, the correct raw material used in the preparation of sodium carbonate (Na₂CO₃) is **Limestone (CaCO₃)**.

### Final Answer
The correct option is **Option 2: Limestone**.

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