Select whether the statement is true or false . Molarity change with change in temp.

Answer

To determine whether the statement "Molarity changes with change in temperature" is true or false, let's analyze the concept of molarity and how it relates to temperature.

### Step-by-Step Solution:

1. **Definition of 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. **Effect of Temperature on Volume**:
When temperature increases, the volume of the solution typically expands. This is due to the thermal expansion of liquids, which means that as temperature rises, the volume of the liquid increases.

3. **Relationship Between Molarity and Volume**:
Since molarity is inversely related to the volume of the solution (assuming the number of moles of solute remains constant), if the volume increases due to a rise in temperature, the molarity will decrease. This can be expressed as:
\[ \text{If Volume increases} \Rightarrow \text{Molarity decreases} \]

4. **Conclusion**:
Therefore, the statement "Molarity changes with change in temperature" is **True**. As temperature changes, the volume of the solution changes, which in turn affects the molarity.

### Final Answer:
**True**