A : `K_(sp)` is a constant value for any salt at particular temperature
R: Solubility of any salt is constant at a particular temperature.

Options

A. If both Assertion & Reason are true and the reason in the corret explanation of the assertion, then mark
B. If both assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark
C. If Assertion is true statement but Reason is false then mark
D. If both Assertion and Reason are false statements , then mark

Answer

To solve the question regarding the Assertion and Reasoning, we will analyze both statements step by step.

### Step 1: Understand the Assertion
**Assertion (A):** \( K_{sp} \) is a constant value for any salt at a particular temperature.

- **Explanation:** The solubility product constant (\( K_{sp} \)) is defined for a saturated solution of a salt at a specific temperature. It represents the product of the molar concentrations of the ions in the solution, each raised to the power of their coefficients in the balanced equation. At a constant temperature, the value of \( K_{sp} \) remains constant for a given salt.

### Step 2: Understand the Reason
**Reason (R):** Solubility of any salt is constant at a particular temperature.

- **Explanation:** The solubility of a salt is the maximum amount of the salt that can dissolve in a given quantity of solvent at a specific temperature. If the temperature is held constant, the solubility of the salt will also remain constant. However, it is important to note that solubility can change with temperature; thus, the statement is true only when the temperature is fixed.

### Step 3: Analyze the Relationship Between A and R
- The assertion states that \( K_{sp} \) is constant at a particular temperature, which is true.
- The reason states that solubility is constant at a particular temperature, which is also true but requires clarification. It implies that if temperature is constant, then solubility does not change, which aligns with the assertion.

### Step 4: Conclusion
Both the assertion and the reason are true. Furthermore, the reason correctly explains the assertion because the constancy of solubility at a fixed temperature leads to the constancy of \( K_{sp} \).

### Final Answer
Both Assertion and Reason are true, and the Reason is a correct explanation of the Assertion.