Question

Chromatography:
A food scientist is testing the food colouring used in cans of drink. She has to
check that any colouring used does not contain any banned chemical.
She places drops of the drink on chromatography paper. She allows the colouring
to separate using water.
She also makes another chromatogram, using drops of all the permitted chemical
colourings. If she finds anything that does not match with these colourings, she
will have to carry out further tests.
The diagrams show her two chromatograms.
chromatogram from the drink
chromatogram of the permitted chemicals
Why is the spot of drink placed above the water line at the start of the process?​

Answer 1

Answer:

If your start line is inside the solvent or equal to level of solvent it can cause error. The solvent gives extra energy to pull up the sample and the sample will also dissolve in the solvent. That's why as precautionary measure start line should stay above the solvent in chromatography!

Explanation:

hope it helps you

Answer 2

Answer:

The drops will not move up the paper

Explanation:

the drops will be dissolved by the water.