In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Extent of adsorption of adsorbate from solution phase increases with increase in amount of adsorbate in solution.
Reason (R): Freundlich's equation describes the behaviour of adsorption from a solution.

Options

A. Both A and Rare true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false and R is True

Explanation

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

### Step 1: Analyze the Assertion (A)
- **Assertion (A)** states: "Extent of adsorption of adsorbate from solution phase increases with increase in amount of adsorbate in solution."
- This statement is generally true because, as the concentration of the adsorbate in the solution increases, more molecules are available to be adsorbed onto the surface of the adsorbent. Therefore, the extent of adsorption will increase.

### Step 2: Analyze the Reason (R)
- **Reason (R)** states: "Freundlich's equation describes the behaviour of adsorption from a solution."
- The Freundlich adsorption isotherm is indeed a model that describes how the amount of adsorbate adsorbed onto a surface varies with the concentration of the adsorbate in the solution. The equation is given by:
\[ \frac{x}{m} = k c^{\frac{1}{n}} \]
where:
- \(x\) = amount of adsorbate
- \(m\) = amount of adsorbent
- \(k\) = Freundlich constant
- \(c\) = concentration of the adsorbate in solution
- \(n\) = constant that indicates the adsorption intensity.

### Step 3: Connect Assertion and Reason
- From the Freundlich equation, we can derive that as the concentration \(c\) increases, the amount of adsorbate \(x\) also increases. This supports the assertion that the extent of adsorption increases with the amount of adsorbate in the solution.

### Conclusion
- Both the Assertion (A) and Reason (R) are correct.
- The Reason (R) provides a correct explanation for the Assertion (A).

### Final Answer
- Both Assertion (A) and Reason (R) are correct, and R is the correct explanation of A.