Question detail
In chromatography, what would you expect to see if a mixture is analyzed instead of a pure substance?
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 would you expect to see if a mixture is analyzed instead of a pure substance?
Answer
A high-scoring answer should explain explain that a pure substance produces a single spot on a chromatogram. 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
Misunderstanding Pure Substances
Students often think that a pure substance can produce multiple spots on a chromatogram.
Remember that a pure substance will always produce a single spot on a chromatogram, indicating it is not mixed with any other substances.
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