Assertion `:-` `BaSO_(4)` forms white ppt in water.
Reason `:-` Its lattice energy is lower than its hydration energy.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False

Answer

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "BaSO₄ forms a white precipitate in water."
- **Analysis**: Barium sulfate (BaSO₄) is known to be insoluble in water. When BaSO₄ is added to water, it does not dissolve and instead forms a white precipitate. Therefore, the assertion is **true**.

### Step 2: Understand the Reason
The reason states that "Its lattice energy is lower than its hydration energy."
- **Analysis**: Lattice energy is the energy required to separate one mole of a solid ionic compound into its gaseous ions. Hydration energy is the energy released when gaseous ions are surrounded by water molecules. For BaSO₄, the lattice energy is actually **greater** than the hydration energy, which is why it does not dissolve in water. Therefore, the reason is **false**.

### Conclusion
- The assertion is true (BaSO₄ does form a white precipitate in water).
- The reason is false (the lattice energy of BaSO₄ is greater than its hydration energy, not lower).

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

### Final Answer
Assertion is true, but the reason is false.

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