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Q.

A chromatography column, packed with silica gel as stationary phase was used to separate a mixture of compounds consisting of (A) benzanilide (B) aniline and (C) acetophenone. When the column is eluted with a mixture of solvent hexane: ethyl acetate (20:80), the sequence of obtained compounds is:

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a

(A), (B) and (C)

b

(B), (A) and (C)

c

(B), (C) and (A)    

d

(C), (A) and (B)

answer is B.

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Detailed Solution

The compounds run on the stationary phase and they interact based on they nature.

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Dipole moment : C > A > B

Hence the sequence of obtained compounds is (C), (A) and (B)

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A chromatography column, packed with silica gel as stationary phase was used to separate a mixture of compounds consisting of (A) benzanilide (B) aniline and (C) acetophenone. When the column is eluted with a mixture of solvent hexane: ethyl acetate (20:80), the sequence of obtained compounds is: