3. Two samples of unknown alkaloids (X and Y) are analysed using paps chromatography. They are compared against the results obtained with samples of foi known alkaloids A, B, C and D. The results are shown in the table below:
Sample Rf value A 0.1 B 0.5 C 0.7 D 0.8 X 0.1 and 0.3 Y 0.5
(a) Suggest a reason as to why X has two Rf values. (b) Use the results above to discuss the composition of samples X and Y.