Which statement best describes the primary purpose of column chromatography?

Which statement best describes the primary purpose of column chromatography?

• A. To determine boiling points of mixtures.
• B. To measure the color of compounds.
• C. To quantify molecular weight.
• D. To purify compounds and separate mixtures.

Answer: (D)

Column chromatography is about separating components of a mixture and obtaining purified compounds by exploiting differences in how each component interacts with the stationary phase versus the mobile phase. As the mixture travels through the column, components that interact less with the stationary phase travel faster and elute earlier, while those with stronger interactions are retained longer, allowing you to collect distinct, purer fractions. This separation and purification is what the technique is designed to accomplish. Boiling points are determined by distillation, not chromatography; color is a visible property rather than a result of the separation process; and molecular weight is measured by other analytical methods, though some chromatographic techniques can give rough MW estimates, the primary aim of standard column chromatography is separation and purification.

Column chromatography is about separating components of a mixture and obtaining purified compounds by exploiting differences in how each component interacts with the stationary phase versus the mobile phase. As the mixture travels through the column, components that interact less with the stationary phase travel faster and elute earlier, while those with stronger interactions are retained longer, allowing you to collect distinct, purer fractions. This separation and purification is what the technique is designed to accomplish.

Boiling points are determined by distillation, not chromatography; color is a visible property rather than a result of the separation process; and molecular weight is measured by other analytical methods, though some chromatographic techniques can give rough MW estimates, the primary aim of standard column chromatography is separation and purification.