Chemistry · Oct / Nov 2020 · Paper 12 · Question 3
5070Chromatography
Chromatography can be used to separate and identify dyes present in a mixture. Which statement is correct?
- AA dye with an Rf value of 1.2 can be present in a mixture.
- BA dye could have a different Rf value if a different solvent was used.
- CAll blue dyes have the same Rf value.
- DChromatography can only be used for coloured substances such as dyes.
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Correct answer: B. A dye could have a different Rf value if a different solvent was used.
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