Chemistry · May / June 2023 · Paper 12 · Question 39

The results of a paper chromatography experiment are shown. X is an aqueous solution of a salt of a Group I element. Y is an aqueous solution of a salt of a transition element. [chromatography diagram with solvent front, baseline, spots for X and Y] Which row is correct?

1. Alarger Rf value: X; requires a locating agent: X
2. Blarger Rf value: X; requires a locating agent: Y
3. Clarger Rf value: Y; requires a locating agent: X
4. Dlarger Rf value: Y; requires a locating agent: Y

As printed in the paper