A :Vapour pressure of the liquid increases with increase in temperature.
R : At elevated temperture increases .

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step 1: Understand the Assertion (A)
The assertion states that "Vapor pressure of the liquid increases with increase in temperature."

- **Explanation**: This statement is true. As the temperature of a liquid increases, the kinetic energy of its molecules also increases. This increase in kinetic energy allows more molecules to escape from the liquid phase into the vapor phase, thereby increasing the vapor pressure.

### Step 2: Understand the Reason (R)
The reason states that "At elevated temperature increases."

- **Explanation**: This statement is vague and incomplete. It seems to imply that something increases at elevated temperatures, but it does not specify what is increasing. The correct reasoning for the increase in vapor pressure is that the kinetic energy of the molecules increases, which allows more molecules to escape into the vapor phase.

### Step 3: Determine the Truth of the Statements
- Assertion (A) is **True** because vapor pressure does indeed increase with temperature.
- Reason (R) is **False** because it does not accurately explain why vapor pressure increases; it lacks clarity and specificity.

### Conclusion
Since the assertion is true and the reason is false, the correct answer is that the assertion is true and the reason is false.

### Final Answer
Assertion (A) is True and Reason (R) is False.