Question detail
Which answer avoids confusing chromatography with another qualitative analysis result?
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. To dissolve the sample
- B. To provide a surface for separation
- C. To increase the temperature
- D. To measure the distance moved
Answer
The correct answer is To provide a surface for separation. 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 To provide a surface for separation. Use this as an exam check: if the observation is not Rf or separation evidence, the conclusion about chromatography is not properly supported. 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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