Multiple choice chem test

Question

The food dye is a mixture of various components.

The paper chromatography technique aims at identifying the different components on the basis of their differing:

a. Colours

b. boiling points

c. Solubilities

d. Densities

Question 2

Why must the samples be placed above the level of the height of the solvent, on the paper?

a. Otherwise the sample will dissolve into the solvent and the results will not be accurate.

b. So the solvent can run evenly up the paper

c. So the sample will run straight up the paper and not in a crooked direction.

d. The solvent will contaminate the sample if it comes into contact with it.

Answer 1

c) solubility's

a) the sample would be dissolved in the solvent and wouldn't run up because lack of sample.

Answer 2

Q.1 - a-Colours

Q.2 - b-so the solvent can run evenly up the paper