(e) How can you tell from Figure 2 that the Rf for the blue ink is greater than the Rf value for the red ink? ........................................................................................................................ ........................................................................................................................ (1) (Total 13 marks) Q2. Icing on cakes is tested to check that safe colours were used when they were made. Paper chromatography is one method of testing which colours are in cake icing.
(e) How can you tell from Figure 2 that the Rf for the blue ink is greater than the Rf value for the red ink? ........................................................................................................................ ........................................................................................................................ (1) (Total 13 marks) Q2. Icing on cakes is tested to check that safe colours were used when they were made. Paper chromatography is one method of testing which colours are in cake icing.
Mr%20Akhtar_1.docx