Question detail
A student is testing chromatography. Which choice keeps the observation and conclusion correctly linked?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Purity, formulations and chromatography
Question
- A. They will merge into one spot
- B. They will produce multiple distinct spots
- C. They will disappear completely
- D. They will only show the solvent front
Answer
The correct answer is They will produce multiple distinct spots. It matches chromatography because the evidence is spot and solvent-front distances and the expected result is Rf or separation evidence.
Explanation
The correct option is They will produce multiple distinct spots. 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. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Misunderstanding Mixtures
Students often think that a mixture will produce only one spot on a chromatogram, similar to a pure substance.
Remember that a mixture can contain multiple components, leading to multiple spots on the chromatogram.
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