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WorksheetsGrade 8 Test Feb 2025
Total questions: 25
Worksheet time: 20mins
Ink can be separated by a method of -----------------------------------------------
distillation
filtration
chromatography
sedimentation
What is the correct image of paper chromatography???
What is chromatography?
A way to see pretty colors
A laboratory technique used to separate a mixture.
A form of distillation
Two or more substances that are mixed together but not chemically combined create a...
solvent
compound
mixture
Which is the correct set up for simple distillation?
A
B
Which is the correct set up?
A
B
Saltwater was separated using a simple distillation set-up. Identify the distillate.
(a)
Predict the reading on the thermometer during the separation of saltwater. (a) oC
Name the separation technique
Simple distillation
Crystallisation
Magnetic Separation
Condensation
Which separation technique is used to obtain pure water from seawater?
Simple distillation
Filtration
Chromatography
Evaporation
In a salt water solution ...
Salt is the solute and water is the solvent
Salt is the solvent and water is the solute
solute + solvent =
solution
equation
In a salt solution, what is the solute?
Water
Saltwater
Salt
There is no solute, it is insoluble
8. Is decantation method applicable to all types of mixtures?
a. yes
b. no
c. maybe
d. sometimes
What is the separating funnel used for-
To separate two miscible substances
To separate one miscible and one immiscible substances
To separate insoluble solid substances
To separate two immiscible substances
In separating funnels, liquids are separated based on their (a)
Evaporation is the change of state from ____ to ____
liquid to solid
solid to liquid
liquid to gas
gas to liquid
What percentage of the atmosphere is oxygen?
78%
21%
12%
1%
The atmosphere is made mostly of (a) gas.
