Assertion : Sulphuric acid reacts with sodium chloride in the following way: `2NaCl + H_(2)SO_(4) rarr 2HCl + Na_(2)SO_(4)`
Reason : Sulphuric acid because of its low volatility can be used to manufacture more volatile acids from their corresponding salts.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
The assertion states that sulfuric acid reacts with sodium chloride to produce hydrochloric acid and sodium sulfate:
\[ 2 \text{NaCl} + \text{H}_2\text{SO}_4 \rightarrow 2 \text{HCl} + \text{Na}_2\text{SO}_4 \]
This reaction is indeed true. Sulfuric acid can react with sodium chloride to produce hydrochloric acid, which is a more volatile acid.

**Hint**: Check the chemical equation to confirm the products formed from the reactants.

2. **Understanding the Reason**:
The reason states that sulfuric acid, due to its low volatility, can be used to manufacture more volatile acids from their corresponding salts. This is also true because sulfuric acid is a strong acid with significant hydrogen bonding, which contributes to its low volatility. In contrast, hydrochloric acid (HCl) is a gas at room temperature and has high volatility.

**Hint**: Consider the properties of sulfuric acid and how they compare to other acids regarding volatility.

3. **Evaluating the Relationship**:
The reason explains why sulfuric acid can be used to produce more volatile acids from salts. The low volatility of sulfuric acid allows it to remain in the reaction mixture while the more volatile products (like HCl) can be released.

**Hint**: Think about how the properties of the reactants and products affect the reaction dynamics.

4. **Conclusion**:
Since both the assertion and reason are true, and the reason correctly explains the assertion, we conclude that the correct answer is:
- **Both assertion and reason are true, and the reason is the correct explanation of the assertion.**

### Final Answer:
The correct option is **A**: Both assertion and reason are true, and the reason is the correct explanation of the assertion.