Which of the following is correct?

Options

A. A liquid with low vapour pressure will have a low surface tension and high boiling point
B. a liquid with high vapour pressure will have intermolecular forces and high boiling point
C. a liquid with low vapour pressure will have high surface tension and high boiling point
D. a liquid with low vapour pressure will have surface tension and low boiling point

Answer

To solve the question, we need to analyze the statements regarding the properties of liquids in relation to their vapor pressure, surface tension, and boiling point.

### Step-by-Step Solution:

1. **Understanding Vapor Pressure**:
- Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid phase. A liquid with low vapor pressure is less volatile, meaning it does not evaporate easily.

**Hint**: Recall that low vapor pressure indicates strong intermolecular forces within the liquid.

2. **Intermolecular Forces**:
- A liquid with low vapor pressure has strong intermolecular forces. This is because the molecules are held together tightly, making it harder for them to escape into the vapor phase.

**Hint**: Strong intermolecular forces lead to higher boiling points and surface tension.

3. **Surface Tension**:
- Surface tension is the energy required to increase the surface area of a liquid. Liquids with strong intermolecular forces typically have high surface tension because the molecules at the surface are pulled inward by the cohesive forces of the liquid.

**Hint**: Consider how the molecules interact at the surface compared to those in the bulk of the liquid.

4. **Boiling Point**:
- The boiling point of a liquid is the temperature at which its vapor pressure equals the atmospheric pressure. A liquid with strong intermolecular forces will require more energy (higher temperature) to overcome these forces, resulting in a higher boiling point.

**Hint**: Remember that boiling point is influenced by the strength of intermolecular forces.

5. **Analyzing the Options**:
- Now, let's evaluate the provided options based on our understanding:
- **Option A**: A liquid with low vapor pressure will have low surface tension and high boiling point. (Incorrect)
- **Option B**: A liquid with high vapor pressure will have intermolecular forces and high boiling point. (Incorrect)
- **Option C**: A liquid with low vapor pressure will have high surface tension and high boiling point. (Correct)
- **Option D**: A liquid with low vapor pressure will have surface tension and low boiling point. (Incorrect)

6. **Conclusion**:
- The correct statement is **Option C**: A liquid with low vapor pressure will have high surface tension and high boiling point.

### Final Answer:
**Option C**: A liquid with low vapor pressure will have high surface tension and high boiling point.