Question detail
Which statement would earn credit for Interpret a chromatogram to identify whether a sample is pure or a mixture.?
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. A pure substance gives one spot on the chromatogram
- B. A pure substance always gives several spots on the chromatogram
- C. A pure substance cannot move with the solvent
- D. A pure substance is identified by a gas test
Answer
The correct answer is A pure substance gives one spot on the chromatogram. 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 A pure substance gives one spot on the chromatogram. The answer stays inside Purity, formulations and chromatography by linking the observation to the conclusion instead of naming a substance without evidence. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Misinterpreting Chromatograms
Students often think that a sample with multiple spots on a chromatogram is always impure, without considering the possibility of a mixture.
Students should remember that a mixture can produce multiple spots, while a pure substance produces a single spot. They should analyze the context of the sample to make accurate interpretations.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.