A mixture of sodium oxide and calcium oxide are dissolved in water and saturated with excess carbon dioxide gas. The resulting solution is ......... It contains :

Options

A. basic, NaOH and `Ca(OH)_(2)`
B. neutral, `Na_(2)CO_(3)` and `CaCO_(3)`
C. basic, `Na_(2)CO_(3)` and `CaCO_(3)`
D. acidic, NaOH and `CaCO_(3)`

Explanation

To solve the question regarding the resulting solution from a mixture of sodium oxide and calcium oxide dissolved in water and saturated with excess carbon dioxide gas, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compounds**:
- Sodium oxide (Na2O) and calcium oxide (CaO) are the two compounds in the mixture.

2. **Dissolution in Water**:
- When sodium oxide dissolves in water, it reacts to form sodium hydroxide (NaOH):
\[ \text{Na}_2\text{O} + \text{H}_2\text{O} \rightarrow 2\text{NaOH} \]
- Similarly, calcium oxide reacts with water to form calcium hydroxide (Ca(OH)2):
\[ \text{CaO} + \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2 \]

3. **Saturation with Carbon Dioxide**:
- The resulting sodium hydroxide solution is then saturated with excess carbon dioxide (CO2). The reaction can be represented as:
\[ 2\text{NaOH} + \text{CO}_2 \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text{O} \]
- Calcium hydroxide will also react with carbon dioxide to form calcium carbonate (CaCO3):
\[ \text{Ca(OH)}_2 + \text{CO}_2 \rightarrow \text{CaCO}_3 + \text{H}_2\text{O} \]

4. **Resulting Compounds**:
- After the reactions, the resulting solution contains:
- Sodium carbonate (Na2CO3)
- Calcium carbonate (CaCO3)

5. **Nature of the Solution**:
- Sodium carbonate is a salt formed from a strong base (NaOH) and a weak acid (H2CO3), which makes the solution basic.
- Calcium carbonate is a salt formed from a strong base (Ca(OH)2) and a weak acid (H2CO3), but it is less soluble in water.

6. **Conclusion**:
- Therefore, the resulting solution is basic and contains both sodium carbonate and calcium carbonate.

### Final Answer:
The resulting solution is basic and contains sodium carbonate (Na2CO3) and calcium carbonate (CaCO3).

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