From the figure of column chromatography give | vedclass

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(A) In column chromatography,the stationary phase is typically polar (e.g.,silica gel).The compound that is least polar moves faster and elutes first,

Vedclass · Accepted Answer

$A, B$ and $C$ only

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(A) In column chromatography,the stationary phase is typically polar (e.g.,silica gel).The compound that is least polar moves faster and elutes first,while the most polar compound moves slower and elutes last.Based on the figure,compound '$a$' is at the top,'$b$' is in the middle,and '$c$' is at the bottom (closest to the exit).Therefore,the order of elution is '$c$' (first),then '$b$',then '$a$' (last).This implies that '$c$' is the least polar and '$a$' is the most polar.Let's evaluate the statements:$A.$ '$c$' is more polar than '$a$' and '$b$': Incorrect,'$c$' is the least polar.$B.$ '$a$' is least polar: Incorrect,'$a$' is the most polar.$C.$ '$b$' comes out of the column before '$c$' and after '$a$': Incorrect,'$c$' comes out first,then '$b$',then '$a$.'$D.$ '$a$' spends more time in the column: Correct,as it is the most polar and interacts most strongly with the stationary phase.The incorrect statements are $A, B,$ and $C$.

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