Paper Chromatography Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What is the stationary phase in paper chromatography?
- A. The solvent
- B. The paper
- C. The pencil line
- D. The dye
2. Which property of the substances in a mixture causes them to separate during chromatography?
- A. Their colour
- B. Their melting point
- C. Their solubility in the solvent
- D. Their density
3. Why is the baseline drawn in pencil rather than ink?
- A. Pencil is easier to see
- B. Ink would dissolve in the solvent and run, ruining the results
- C. Pencil makes the paper stronger
- D. Ink reacts with the solvent chemically
4. A substance travels 9 cm up the paper while the solvent front travels 12 cm. What is its Rf value?
- A. 0.25
- B. 0.75
- C. 1.33
- D. 9.0
5. A chromatogram of an unknown ink sample shows four separate spots. What is the best conclusion?
- A. The ink is a pure substance
- B. The ink is a mixture of at least four components
- C. The test has failed and must be repeated
- D. The ink contains no coloured substances