Two compounds I and II are eluted by column chromato-graphy(adsorption of I $>$ II). Which one of the…

Two compounds I and II are eluted by column chromato-graphy(adsorption of I $>$ II). Which one of the following is a correct statement?
  1. II moves slower and has higher $\mathrm{R}_{\mathrm{f}}$ value than I
  2. II moves faster and has higher $\mathrm{R}_{\mathrm{f}}$ value than I
  3. I moves faster and has higher $\mathrm{R}_{\mathrm{f}}$ value than II
  4. I moves slower and has higher $\mathrm{R}_{\mathrm{f}}$ value than I

Solution

Since, adsorption of I $>$ II, I is firmly attached to column (stationary phase). Hence, it will move slowly and will move little distance. A1so II is loosely attached to column (stationary phase). Hence, it will move faster and will move large distance.

Asked in: JEE Main 2018 (15 Apr Shift 2 Online)

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