Question

During a column chromatography through $\mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$ 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?

• A. The order of adsorption of A, B and C is C>B>A.
• B. The order of adsorption of A, B and C is A>B>C
• C. The order of adsorption of A, B and C is B>A>C
• D. The order of adsorption of A, B and C is B>C>A

Answer 1

Answer: (A)

The order of adsorption of A, B and C is C>B>A.

Answer 2

Since compound ‘A’ comes out before ‘B’, ‘B’ is more readily adsorbed to the column and ‘B’ comes out before ‘C’, hence ‘C’ is more readily adsorbed than ‘B’ hence the order of adsorption is C>B>A.