The $R_{f}$ value of A and B in a mixture determined by TLC in a solvent are $0.65$ and $0.42$ respectively. If the mixture is separated by column chromatography using the same solvent mixture as a mobile phase, which of the two compounds, A or B will elute first? Explain.

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Solution

Since the $R_{f}$ value of A is $0.65,$ therefore, it is less strongly absorbed as compared to compound B with $R_{f}$ value of $0.42.$ Therefore, on extraction of the column, A will elute first.

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The Rf value of A and B in a mixture determined by TLC in a solvent are 0.65 and 0.42 respectively. If the mixture is separated by column chromatography using the same solvent mixture as a mobile phase, which of the two compounds, A or B will elute first? Explain.

Since the Rf value of A is 0.65, therefore, it is less strongly absorbed as compared to compound B with Rf value of 0.42. Therefore, on extraction of the column, A will elute first.

The $R_{f}$ value of A and B in a mixture determined by TLC in a solvent are $0.65$ and $0.42$ respectively. If the mixture is separated by column chromatography using the same solvent mixture as a mobile phase, which of the two compounds, A or B will elute first? Explain.

Since the $R_{f}$ value of A is $0.65,$ therefore, it is less strongly absorbed as compared to compound B with $R_{f}$ value of $0.42.$ Therefore, on extraction of the column, A will elute first.