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Factors Affecting the Rate of a Chemical Reaction

Two compounds...

Question

Two compounds I and II are eluted by column chromatography (adsorption of I $>$ II). Which one of the following is a correct statement?

II moves slower and has higher

R_{f}

value than I

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II moves faster and has higher

R_{f}

value than I

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I moves faster and has higher

R_{f}

value than II

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I moves slower and has higher

R_{f}

value than II

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Solution

The correct option is A II moves faster and has higher $R_{f}$ value than I
Two compounds I and II are eluted by column chromatography (adsorption of I $>$ II). The statement (B) is a correct statement.
II moves faster and has higher $R_{f}$ value than I
Since, adsorption of I $>$ II, I is firmly attached to column (stationary phase). Hence, it will move slowly and will move little distance. Also, II is loosely attached to column (stationary phase). Hence, it will move faster and will move large distance.

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Two compounds I and II are eluted by column chromatography (adsorption of I > II). Which one of the following is a correct statement?

Two compounds I and II are eluted by column chromatography (adsorption of I $>$ II). Which one of the following is a correct statement?