A : Zn dissolve in excess of NaOH solution so as to give `H_(2)`
R : `Zn(OH)_(2)` is neutral is nature.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanantion of the assertion, then mark (2)
C. If assertion is true statements but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze the two statements provided:

**Assertion (A):** Zinc dissolves in excess of NaOH solution to give \( H_2 \).
**Reason (R):** \( Zn(OH)_2 \) is neutral in nature.

### Step-by-Step Solution:

1. **Understanding the Assertion:**
- When zinc (Zn) is added to an excess of sodium hydroxide (NaOH), a reaction occurs.
- The balanced chemical equation for this reaction is:
\[ Zn + 2NaOH \rightarrow Na_2ZnO_2 + H_2 \]
- Here, zinc reacts with sodium hydroxide to form sodium zincate (\( Na_2ZnO_2 \)) and hydrogen gas (\( H_2 \)) is evolved.
- Therefore, the assertion that zinc dissolves in excess NaOH to give hydrogen is **true**.

2. **Understanding the Reason:**
- The reason states that \( Zn(OH)_2 \) is neutral in nature.
- However, \( Zn(OH)_2 \) is actually amphoteric, meaning it can react with both acids and bases.
- It can react with acids to form salts and water, and with bases to form complex ions.
- Thus, the statement that \( Zn(OH)_2 \) is neutral is **false**.

3. **Conclusion:**
- The assertion is true, while the reason is false.
- Therefore, the correct answer is that the assertion is true but the reason is false.

### Final Answer:
The assertion (A) is true, and the reason (R) is false.