Question detail
What are the two phases involved in chromatography, and how do they function in the separation of substances?
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
What are the two phases involved in chromatography, and how do they function in the separation of substances?
Answer
A high-scoring answer should explain explain that chromatography involves a stationary phase and a mobile phase. Use method first, observation second, conclusion last: name the relevant test or measurement, state the observation, and then connect the result to Chromatography.
Explanation
This is correct because spot and solvent-front distances is the evidence expected for chromatography, and Rf or separation evidence is the result that supports the conclusion. A complete answer should use the approved objective wording, include the relevant evidence, and avoid unsupported identification claims.
Common mistake
Confusing Phases in Chromatography
Students often confuse the stationary phase with the mobile phase in chromatography.
Correct this by using the approved Chromatography context: Explain that chromatography involves a stationary phase and a mobile phase. Name the correct test or chemistry idea, state the observation accurately, and then give the conclusion supported by that evidence. Do not swap gas tests, flame tests, cation tests, anion tests, chromatography terms, pure substances, and formulations.
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