During a column chromatography through `Al_(2)O_(3)` column, a mixture of components A,B and C is passed through the column. On adding eluant, compound 'A' is eluted first then 'B' and in the end 'C'. Which of the following statements regarding the components is correct ?

Options

A. The order of adsorption of A, B and C is `C gt B gtA`
B. The order of adsorption of A,B and C is `A gt B gt C`
C. The order of adsorption of A,B and C is `B gt A gt C`
D. The order of adsorption of A, B and C is `B gt C gt A`

Explanation

To solve the question regarding the order of adsorption of components A, B, and C during column chromatography using an Al₂O₃ column, we can follow these steps:

### Step 1: Understand the Process of Column Chromatography
Column chromatography is a technique used to separate different components of a mixture based on their adsorption properties. The components interact with the stationary phase (in this case, Al₂O₃) and the mobile phase (the eluent) differently.

### Step 2: Analyze the Elution Order
According to the question, the components are eluted in the following order:
1. A (first to elute)
2. B (second to elute)
3. C (last to elute)

### Step 3: Determine the Order of Adsorption
The order of elution is inversely related to the order of adsorption. This means that the component that elutes first is the least adsorbed, while the component that elutes last is the most adsorbed.

- Since A is eluted first, it is the least adsorbed.
- B is eluted second, indicating it has a moderate level of adsorption.
- C is eluted last, meaning it is the most adsorbed.

### Step 4: Conclude the Order of Adsorption
From the above analysis, we can conclude the order of adsorption:
- C (most adsorbed)
- B (moderately adsorbed)
- A (least adsorbed)

Thus, the order of adsorption is C > B > A.

### Step 5: Identify the Correct Statement
Based on the order of adsorption determined, the correct statement regarding the components is that the order of adsorption of A, B, and C is C, B, A.

### Final Answer
The correct option is that the order of adsorption of A, B, and C is C, B, A.

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