Chromatography Quiz

What is the primary purpose of chromatography?

• To dissolve pigments in water

• To mix different pigments

• To separate mixtures of colored substances

• To create new colors

Why is it important to draw the line on chromatography paper with a pencil?

• Pencil lines are easier to erase

• Pencil lines are more visible

• Pencil does not dissolve in the solvent

• Pencil is cheaper than ink

What should be avoided when placing the chromatography paper in the solvent?

• The solvent should touch the ink spot

• The solvent should be colored

• The solvent should cover the entire paper

• The solvent should not go over the pencil line

In the experiment, what is the role of the solvent?

• To color the paper

• To hold the paper in place

• To dry the ink

• To dissolve the pigments and carry them up the paper

Why might a different solvent be used instead of water in chromatography?

• To change the color of the pigments

• To dissolve pigments that do not dissolve in water

• To make the paper more durable

• To speed up the process

How do pigments separate during chromatography?

• They evaporate into the air

• They travel at different speeds due to solubility

• They are attracted to the paper

• They dissolve at the same rate

What is the significance of the distance traveled by pigments on the chromatography paper?

• It indicates the size of the pigments

• It shows the solubility and attraction to the solvent

• It measures the weight of the pigments

• It determines the color intensity

What does it mean if a chromatogram shows only one spot for a sample?

• The sample is contaminated

• The sample did not dissolve

• The sample is pure

• The sample is a mixture of pigments

What is a chromatogram?

• A type of chromatography paper

• A chart showing separated pigments

• A solvent used in chromatography

• A tool to measure pigment concentration

What can be inferred if two samples have the same pattern of spots on a chromatogram?

• They were dissolved in different solvents

• They contain the same pigments

• They are different substances

• They were applied incorrectly