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. The solvent used in the process
- B. The paper that holds the sample
- C. The colored ink being tested
- D. The mixture of substances
Answer
The correct answer is The paper that holds the sample. 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 The paper that holds the sample. 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 Chromatography
Students often think that chromatography separates substances based on their color alone.
Emphasize that chromatography separates substances based on their solubility and interaction with the stationary and mobile phases, not just their color.
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