Assertion : `CuSO_(4).5H_(2)O` on heating to `250^(@)C` losses all the five `H_(2) O` molecules and becomes anhydrous.
Reason : All five `H_(2) O` molecules are coordinated to the central `Cu^(2+)` ion.

Options

A. Statement-1 is true , Statement-2 is true and Statement-2 is correct explanation for Statement-1
B. Statement-1 is true, Statement-2 is True and Statement-2 is Not correct explanation for statement-1
C. Statement-1 is true, Statement-2 is False
D. Statement-1 is False, Statement-2 is True

Explanation

To solve the given question, we will analyze both the assertion and the reason provided.

### Step 1: Analyze the Assertion
The assertion states that `CuSO4.5H2O` on heating to `250°C` loses all five `H2O` molecules and becomes anhydrous.

- **Explanation**: Copper(II) sulfate pentahydrate (`CuSO4.5H2O`) is known to lose its water of crystallization upon heating. When heated to around `250°C`, it loses all five water molecules and transforms into anhydrous copper(II) sulfate (`CuSO4`), which is a white solid. This part of the assertion is true.

### Step 2: Analyze the Reason
The reason states that all five `H2O` molecules are coordinated to the central `Cu^(2+)` ion.

- **Explanation**: In the structure of `CuSO4.5H2O`, not all five water molecules are coordinated to the `Cu^(2+)` ion. Typically, only four water molecules are coordinated directly to the copper ion, while the fifth water molecule is involved in hydrogen bonding or is not directly coordinated. Therefore, this statement is false.

### Step 3: Conclusion
Based on the analysis:
- The assertion is true.
- The reason is false.

Thus, the correct conclusion is that the assertion is true, but the reason is false.

### Final Answer
The assertion is true, and the reason is false.

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