WorksheetsG9.3 Chromatography and Rf values
Total questions: 10
Worksheet time: 12mins
Ink can be separated by ____________________ .
distillation
filtration
chromatography
sedimentation
The chromatogram shows that the -------------- spot is a mixture.
red
orange
green
black
A pure substance shows ------------------ spot on chromatogram.
no
one
two
three
The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?
P only
S only
P and S
P and X
What can be done if the unknown sample does not move during chromatography?
Give up on science and become an English teacher.
Try at a higher temperature.
Let it go longer.
Try a different solvent.
A substance is soluble if it can be dissolved.
In paper chromatography, the most soluble solute _____________________ .
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
The mobile phase in paper chromatography is typically a ________ .
plasma
solid
gas
liquid
Why is Chromatography useful?
It can be used as medicine.
It can be used for finding clues at a crime scene
It can be used to make bombs.
It can reduce the lack of food and water.
