(a(i))[2]
Define the following chromatography terms: $R_f$ value; retention time.
(a(ii))[1]
Every type of chromatography uses a stationary phase and a mobile phase. Complete Table 6.1 with a description of each one.
(b)[1]
A mixture containing substances A and B is separated by thin-layer chromatography. The $R_f$ value of substance A is greater than that of substance B. Suggest why substance A has a larger $R_f$ value.
(c(i))[1]
The two isomeric compounds Y and Z are examined by proton ($^1\mathrm{H}$) NMR spectroscopy. Complete Table 6.2 by predicting the number of peaks seen in the proton ($^1\mathrm{H}$) NMR spectra of Y and Z.
(c(ii))[2]
Name all the different splitting patterns shown in the proton ($^1\mathrm{H}$) NMR spectra of Y and Z.