Question detail
In chromatography, what does it mean if a substance produces more than one spot on a chromatogram?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Purity, formulations and chromatography
Question
In chromatography, what does it mean if a substance produces more than one spot on a chromatogram?
Answer
A high-scoring answer should explain describe chromatography as a method used to separate mixtures and identify substances. Use evidence before identification: name the relevant test or measurement, state the observation, and then connect the result to Chromatography.
Explanation
The important distinction is that chromatography must be identified from spot and solvent-front distances; answers that swap in a different test or result do not match Chromatography. A complete answer should use the approved objective wording, include the relevant evidence, and avoid unsupported identification claims.
Common mistake
Confusing Chromatography with Other Methods
Students often confuse chromatography with other separation methods like filtration or distillation.
Focus on the unique aspects of chromatography, such as the use of a stationary phase and a mobile phase for separating mixtures.
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