Pure substances possess
Variable melting points and boiling points
Nonuniform
Variable properties
Fixed melting points and boiling points
A mixture is a / an
Pure substance
Impure substance
Some are pure and others are impure
None
You can use decantation to separate
Two miscible liquids
Two immiscible liquids
Two metals in an alloy
Solid- solid water
In a mixture, solids of different size can be separated by,
Magnetic separation
Winnowing
Sieving
Evaporation
To separate a mixture of two or more gases ______ method is used
Sedimentation
Liquification
Distillation
Decantation
Which one of the following is not an example of a separation?
Tea strainer
Surgical mask
Boiling an egg
Fishing net
Which of the following mixtures could not be separated into its components by decanting?
Beans in hot water
Sand in water
Coffee in hot water
None of the above
Which of the following is not a homogenous mixture?
Sugar solution
Salt solution
Iron fillings in sand
None of these
Which among the following is used to separate a mixture of solids?
Filtration
Condensation
A pure substance is made up of
Only one kind of molecules
Two or more kinds of molecules
Different types of molecules
