A: On increasing temperature vapour pressure of solution increases.
R: Vapour pressure of ether is higher than alcohol.

Answer

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

### Step 1: Analyze the Assertion (A)
The assertion states: "On increasing temperature, vapor pressure of solution increases."

- According to Henry's Law, the vapor pressure (P_H) of a solution is given by the equation:
\[ P_H = k_H \cdot S \]
where \( k_H \) is Henry's law constant and \( S \) is the solubility of the solute in the solvent.

- It is known that solubility (S) generally increases with an increase in temperature for most solids and liquids. Therefore, if the temperature increases, the solubility of the solute increases, leading to an increase in vapor pressure.

- Thus, we can conclude that the assertion is correct: **Increasing temperature does increase the vapor pressure of the solution.**

### Step 2: Analyze the Reason (R)
The reason states: "Vapor pressure of ether is higher than alcohol."

- To compare the vapor pressures of ether and alcohol, we need to consider their molecular structures. Ether (R-O-R) is generally a non-polar molecule, while alcohol (R-OH) is polar due to the presence of the hydroxyl (-OH) group.

- Non-polar substances typically have higher vapor pressures than polar substances because they experience weaker intermolecular forces (like Van der Waals forces) compared to the hydrogen bonding present in alcohols.

- Therefore, we can conclude that the reason is also correct: **The vapor pressure of ether is indeed higher than that of alcohol.**

### Step 3: Determine the Relationship Between A and R
Now we need to determine if the reason (R) is the correct explanation for the assertion (A).

- While both the assertion and reason are correct, the reason provided does not explain why the vapor pressure of a solution increases with temperature. The reason discusses the comparison of vapor pressures between two different substances (ether and alcohol) rather than explaining the effect of temperature on vapor pressure.

### Conclusion
- Assertion (A) is correct.
- Reason (R) is correct.
- However, Reason (R) is not the correct explanation for Assertion (A).

### Final Answer
- Assertion (A) is true.
- Reason (R) is true.
- Reason (R) is not the correct explanation for Assertion (A).

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