Assertion : Copper sulphate solution is not stored in zinc vessel.
Reason : Zinc forms complex with `CuSO_(4)`.

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 reasonb 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 "Copper sulphate solution is not stored in zinc vessel."
- This implies that there is a chemical reason why copper sulphate cannot be safely stored in a zinc container.

2. **Understanding the Reason**:
- The reason provided is "Zinc forms complex with CuSO4."
- We need to determine if this statement is true and if it adequately explains the assertion.

3. **Analyzing the Chemical Reaction**:
- When copper sulfate (CuSO4) is stored in a zinc vessel, zinc (Zn) is more reactive than copper (Cu).
- According to the reactivity series, zinc can displace copper from its compound.
- The reaction can be represented as:
\[ \text{Zn} + \text{CuSO}_4 \rightarrow \text{ZnSO}_4 + \text{Cu} \]
- This indicates that zinc displaces copper from copper sulfate, forming zinc sulfate (ZnSO4) and elemental copper (Cu).

4. **Formation of Complex**:
- The displaced copper can further react with water and sulfate ions to form a complex, which is represented as \(\text{[Zn(H}_2\text{O)}_4]^{2+}\) and \(\text{SO}_4^{2-}\).
- This complex formation is a secondary reaction that occurs after the displacement.

5. **Conclusion**:
- Since zinc displaces copper from copper sulfate, it is indeed correct that copper sulfate solution should not be stored in a zinc vessel.
- The reason provided, while true in the context of complex formation, does not directly explain why copper sulfate cannot be stored in a zinc vessel. The primary reason is the displacement reaction.

### Final Answer:
- **Assertion**: True
- **Reason**: True, but does not correctly explain the assertion.
- Therefore, the correct conclusion is that both the assertion and reason are true, but the reason is not a correct explanation of the assertion.