Which of the following is associated with liquid only and not for gas ?

Options

A. 1. Pressure
B. 2. Volume
C. 3. Density
D. 4. Surface tension

Explanation

To determine which property is associated with liquids only and not with gases, we can analyze the characteristics of both states of matter.

### Step-by-Step Solution:

1. **Understanding the Properties of Liquids and Gases**:
- Both liquids and gases have properties such as pressure, volume, and density. However, certain properties are unique to liquids.

2. **Identifying Unique Properties**:
- One of the key properties that is unique to liquids is **surface tension**. This property arises due to the cohesive forces between liquid molecules.

3. **Cohesive Forces in Liquids vs. Gases**:
- In liquids, the molecules are closely packed together, which allows for significant cohesive forces to act between them. This results in the phenomenon of surface tension.
- In gases, the molecules are much farther apart, and the cohesive forces are very weak. Therefore, surface tension does not exist in gases.

4. **Conclusion**:
- Based on the analysis, we conclude that **surface tension** is associated with liquids only and not with gases.

### Final Answer:
The property that is associated with liquids only and not with gases is **surface tension**.

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