Choose the correct statement(s)

Options

A. Boiling does not occur when liquid is heated in a closed vessel
B. On heating continusoly vapour pressure of a liquid increases in a closed vassei
C. Liquids may be considered as a continuation of gas phase into a region of small volume and very strong molecular attractions
D. All of these

Answer

To solve the question, we need to analyze each statement provided and determine whether they are correct or not based on our understanding of the states of matter, particularly the behavior of liquids and gases.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** Boiling does not occur when a liquid is heated in a closed vessel.
- **Explanation:** Boiling occurs when the vapor pressure of a liquid equals the external pressure. In a closed vessel, as the liquid is heated, its vapor pressure increases. Eventually, it can reach the point where it equals the pressure in the vessel, leading to boiling. Therefore, this statement is **incorrect**.

2. **Analyze the Second Statement:**
- **Statement:** On heating continuously, vapor pressure of a liquid increases in a closed vessel.
- **Explanation:** As the temperature of the liquid increases, the kinetic energy of the molecules increases, leading to more molecules escaping into the vapor phase. This results in an increase in vapor pressure. Therefore, this statement is **correct**.

3. **Analyze the Third Statement:**
- **Statement:** Liquid may be considered as a continuation of the gas phase into a region of small volume and very strong intermolecular attraction.
- **Explanation:** When a gas is compressed into a small volume, the molecules come closer together, and the intermolecular forces become significant. Thus, the transition from gas to liquid can be seen as a continuation of the gas phase under conditions of increased pressure and decreased volume. Therefore, this statement is **correct**.

4. **Conclusion:**
- Based on the analysis:
- The first statement is incorrect.
- The second and third statements are correct.
- Therefore, the correct answer is that **statements 2 and 3 are correct**.

### Final Answer:
- The correct statements are: **2 and 3**.