STATEMENT - 1 : A mixture of ZnO and CuO can be separated by boiling the mixture with `NaOH` solution.
and
STATEMENT - 2 : `ZnO` dissolves in `NaOH` solution while `CuO` remains undissolved.

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 a 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 analyze the statements provided, we can break down the reasoning step by step:

### Step-by-Step Solution:

1. **Understanding the Compounds:**
- **ZnO (Zinc Oxide)**: This is classified as an amphoteric oxide. Amphoteric oxides can react with both acids and bases.
- **CuO (Copper Oxide)**: This is a metallic oxide and is considered a basic oxide. Basic oxides typically react with acids but do not react with bases.

2. **Reaction with NaOH:**
- When a mixture of ZnO and CuO is boiled with NaOH (sodium hydroxide), we need to consider how each oxide behaves in the presence of this strong base.
- **ZnO** will react with NaOH because it is amphoteric:
\[ \text{ZnO} + 2\text{NaOH} \rightarrow \text{Na}_2\text{ZnO}_2 + \text{H}_2\text{O} \]
This reaction produces sodium zincate and water.
- **CuO**, on the other hand, will not react with NaOH and will remain undissolved in the solution.

3. **Separation of the Mixture:**
- Since ZnO dissolves in the NaOH solution while CuO does not, the two can be effectively separated. The undissolved CuO can be filtered out from the solution, leaving the dissolved ZnO in the NaOH solution.

4. **Conclusion on Statements:**
- **Statement 1**: "A mixture of ZnO and CuO can be separated by boiling the mixture with NaOH solution." - This statement is **true**.
- **Statement 2**: "ZnO dissolves in NaOH solution while CuO remains undissolved." - This statement is also **true** and correctly explains why the separation is possible.

5. **Final Answer:**
- Both statements are true, and Statement 2 provides the correct explanation for Statement 1. Therefore, the correct option is:
- **Option 1**: Statement 1 is true, Statement 2 is true, and Statement 2 is the correct explanation for Statement 1.