Statement - I. Molarity of the solution changes with temperature.
Statement - II. volume is function of Temperature.

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 the 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 solve the question, we need to analyze the two statements provided:

**Statement I:** Molarity of the solution changes with temperature.
**Statement II:** Volume is a function of temperature.

### Step-by-Step Solution:

1. **Understanding Molarity:**
- Molarity (M) is defined as the number of moles of solute per liter of solution. The formula for molarity is:
\[ M = \frac{\text{Number of moles of solute}}{\text{Volume of solution in liters}} \]

2. **Identifying Factors Affecting Molarity:**
- Molarity depends on the number of moles of solute and the volume of the solution. The number of moles of solute (which is derived from the mass of solute and its molar mass) remains constant as temperature changes. However, the volume of the solution can change with temperature.

3. **Effect of Temperature on Volume:**
- As temperature increases, the volume of most liquids tends to expand. Conversely, if the temperature decreases, the volume typically contracts. Therefore, volume is indeed a function of temperature.

4. **Conclusion for Statement I:**
- Since the volume of the solution changes with temperature, and molarity is defined as moles of solute divided by the volume of solution, it follows that molarity will also change with temperature. Hence, **Statement I is true.**

5. **Conclusion for Statement II:**
- Since we established that volume changes with temperature, **Statement II is also true.**

6. **Final Evaluation:**
- Both statements are true, and Statement I is supported by Statement II. Therefore, the correct answer is that both statements are true and Statement II correctly explains Statement I.

### Final Answer:
Both statements are true, and Statement II explains Statement I.

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