Chromatography Original Scenario-Based Practice

Chemistry · Matter · Chemistry · Separation of Mixtures

1 Chemistry practice questions on Chromatography. Questions built around original scenarios.

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Questions

  1. 1.

    An exo-botanist investigating a bioluminescent alien flora spots an extract containing two dissolved pigments, Compound X and Compound Y, onto an absorbent cellulose strip. When the lower edge of the strip is submerged in a liquid solvent, the solvent rises by capillary action, carrying Compound X nearly to the solvent front while Compound Y remains close to the baseline. Based on the scientific principles of chromatography, which conclusion correctly explains this difference in migration?

    • A) Compound Y has a higher solubility in the mobile phase and weaker interactions with the stationary phase than Compound X.
    • B) Compound X has a higher affinity for the mobile phase and weaker adsorption to the stationary phase than Compound Y.
    • C) Compound X must be an insoluble solid suspended in the mobile phase that physically floated to the top of the strip.
    • D) Compound Y moved less because it underwent an irreversible chemical reaction with the solvent to form an immovable precipitate.

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