Question detail
What is the role of the stationary phase in chromatography?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chromatography (A-level only)
Question
- A. It moves through the column carrying the sample.
- B. It interacts with the components of the mixture to separate them.
- C. It provides the energy needed for the separation process.
- D. It determines the color of the separated substances.
Answer
It interacts with the components of the mixture to separate them.
Explanation
The stationary phase is the medium that remains fixed in place during chromatography. It interacts with the components of the mixture, allowing for their separation based on different affinities. This interaction is crucial for achieving effective separation, leading to distinct bands on the chromatogram.
Common mistake
Misunderstanding Chromatography Evidence
Students often confuse the roles of stationary and mobile phases in chromatography, leading to incorrect conclusions about separation.
To fix this, students should clearly define the stationary phase as the substance that remains fixed in place and the mobile phase as the solvent that moves through it, ensuring they understand how each contributes to the separation process.
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