Assertion (A): Aqueous solution of `Na_(2)CO_(3)` is alkaline in nature.
Reason (R ): when dissolved in water, `Na_(2)CO_(3)` undergoes anionic hydrolysis.

Options

A. Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
B. Statement-1 is true, statement-2 is true, statement-2 is not correct explanation for statement-1
C. Statement-1 is true, statement-2 is false
D. Statement-1 is false, statement-2 is true

Answer

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understanding the Assertion
The assertion states that the aqueous solution of \( \text{Na}_2\text{CO}_3 \) is alkaline in nature.

- **Explanation**: Sodium carbonate (\( \text{Na}_2\text{CO}_3 \)) is a salt derived from a strong base (sodium hydroxide, \( \text{NaOH} \)) and a weak acid (carbonic acid, \( \text{H}_2\text{CO}_3 \)). When dissolved in water, it dissociates into sodium ions (\( \text{Na}^+ \)) and carbonate ions (\( \text{CO}_3^{2-} \)). The presence of carbonate ions in solution can lead to an increase in hydroxide ions (\( \text{OH}^- \)), making the solution alkaline.

### Step 2: Understanding the Reason
The reason states that when dissolved in water, \( \text{Na}_2\text{CO}_3 \) undergoes anionic hydrolysis.

- **Explanation**: When \( \text{Na}_2\text{CO}_3 \) is dissolved in water, the carbonate ions can react with water in a hydrolysis reaction:
\[ \text{CO}_3^{2-} + \text{H}_2\text{O} \rightleftharpoons \text{HCO}_3^{-} + \text{OH}^- \]
This reaction produces hydroxide ions (\( \text{OH}^- \)), which is characteristic of basic solutions. Since the reaction involves the anion (\( \text{CO}_3^{2-} \)), it is termed anionic hydrolysis.

### Step 3: Conclusion
Both the assertion and the reason are true. Furthermore, the reason correctly explains why the assertion is true.

### Final Answer
- **Assertion (A)**: True
- **Reason (R)**: True
- **Conclusion**: The reason is a correct explanation for the assertion.