Assertion: Mass and volume are extensive properties.
Reason: Mass/volume is also an extensive parameter.

Options

A. If both the assertion and reason are true and reason is correct explanation of the assertion .
B. If both the assertion and reason are true but reason is not a correct explanation of the assertion .
C. If the assertion is true but the reason is false.
D. If both assertion and reason are false.

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Mass and volume are extensive properties."
- Extensive properties are those that depend on the amount of matter present.
- Mass is indeed an extensive property because it increases with the quantity of matter.
- Volume is also an extensive property because it increases as the amount of substance increases.

2. **Conclusion about the Assertion**:
- Since both mass and volume depend on the quantity of matter, the assertion is **true**.

3. **Understanding the Reason**:
- The reason states that "Mass/volume is also an extensive parameter."
- The ratio of mass to volume gives us density (Density = Mass/Volume).
- Density is an intensive property, meaning it does not depend on the amount of substance present. For example, the density of water remains constant regardless of whether you have a cup of water or a whole ocean.

4. **Conclusion about the Reason**:
- Since density (mass/volume) does not depend on the quantity of matter, the reason is **false**.

5. **Final Evaluation**:
- The assertion is true, and the reason is false. Therefore, the correct answer is that the assertion is true but the reason is false.

### Final Answer:
- The correct option is: **Assertion is true but the reason is false.**

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