A: In the reaction,
`2NaOH+H_(2)SO_(4) to Na_(2)SO_(4) + 2H_(2)O`
equivalents of NaOH, `Na_(2)SO_(4)` and `H_(2)SO_(4)` are equal.
R: `"Number of equivalents" = "number of moles" xx "n-factor"`.

Options

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

Answer

To solve the given problem, we need to analyze the assertion and reason statements regarding the reaction between sodium hydroxide (NaOH) and sulfuric acid (H₂SO₄).

### Step-by-Step Solution:

1. **Identify the Reaction**:
The reaction given is:
\[ 2 \text{NaOH} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + 2 \text{H}_2\text{O} \]

2. **Understanding the Assertion**:
The assertion states that the equivalents of NaOH, Na₂SO₄, and H₂SO₄ are equal. To verify this, we need to calculate the number of equivalents for each substance involved in the reaction.

3. **Calculate the n-factor**:
- **For NaOH**:
- NaOH dissociates to give one hydroxide ion (OH⁻) per molecule.
- Therefore, the n-factor of NaOH is 1.
- **For H₂SO₄**:
- H₂SO₄ dissociates to give two H⁺ ions per molecule.
- Therefore, the n-factor of H₂SO₄ is 2.
- **For Na₂SO₄**:
- Na₂SO₄ does not provide any H⁺ or OH⁻ ions in this context, so its n-factor is 0 for this reaction.

4. **Calculate the Number of Equivalents**:
Using the formula:
\[ \text{Number of equivalents} = \text{Number of moles} \times \text{n-factor} \]
- Let’s assume we have 1 mole of H₂SO₄, which means we have 2 moles of NaOH reacting with it.
- For 2 moles of NaOH:
\[ \text{Equivalents of NaOH} = 2 \, \text{moles} \times 1 = 2 \, \text{equivalents} \]
- For 1 mole of H₂SO₄:
\[ \text{Equivalents of H₂SO₄} = 1 \, \text{mole} \times 2 = 2 \, \text{equivalents} \]
- For Na₂SO₄, since it does not contribute to the reaction in terms of H⁺ or OH⁻, we consider its equivalents as 0 in this context.

5. **Conclusion**:
Since the equivalents of NaOH and H₂SO₄ are equal (2 equivalents each), the assertion is true. The reason provided is also true as it correctly states how to calculate the number of equivalents.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion. Therefore, the correct answer is option 1.