SC-925
Chromatography
Lower Sec Science · Secondary 1 · Hard · Chromatography
A black ink dot is placed near the bottom of a strip of filter paper. The paper is then dipped into water in a beaker so that the water level is below the ink dot. After some time, several coloured spots appear higher up the paper. Which statement best explains this observation?
- The ink is a pure substance.
- The dyes in the ink have the same solubility in water.
- The different dyes in the ink travel at different speeds in water.
- The water reacts chemically with the ink to form new colours.
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