Question detail
How can chromatography evidence be combined with spectroscopic data in analysis?
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. By using chromatography to determine the color of the compounds.
- B. By comparing retention times with known spectra to identify compounds.
- C. By measuring the temperature during chromatography.
- D. By analyzing the solvent used in the chromatography process.
Answer
By comparing retention times with known spectra to identify compounds.
Explanation
Combining chromatography evidence with spectroscopic data allows for more accurate identification of compounds. The retention times from chromatography can be matched with spectral data, providing a comprehensive analysis of the mixture and confirming the presence of specific substances.
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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