Question

Gary wanted to find out if some food colourings contained a banned food dye.
          He put a drop of each food colouring and the banned food dye onto some special paper. He hung the paper in a beaker of water.

          After 10 minutes, the banned food dye and some of the dyes from the food colourings had moved up the paper.
Gary’s results are shown below.

(a)     Gary wrote the labels on the paper in pencil.
Why should he not write them in ink?
(b)     Look at Gary’s results.
The different dyes in some of the food colourings had moved up the paper.
(i)      Which food colouring contained the banned food dye?
(ii)     Which food colouring contained the most dyes?


(c)     Which food colouring did not dissolve in the water?

(d)     Which method did Gary use to separate the dyes?
Tick the correct box.
chromatography                   distillation        
evaporation                             filtration        

Answer 1

answer d is chromatography as chromatography is the process used to seperate dyes from ink.........