To separate a mixture of two or more gases ______ method is used.
Sedimentation
Liquification
Distillation
Decantation
A mixture is a / an
Pure substance
Impure substance
Some are pure and others are impure
None
Wheat flour is separated from wheat bran by the method of
Hand picking
Sieving
Winnowing
Filtration
Which of the following mixtures will be the most difficult to separate ?
Iron filings + sand
Sand + water
Saw dust + stones
Nitrogen + hydrogen
Identify the mixture from the following
Carbon dioxide
Iron
Hydrogen
Air
A pure substance is made up of
Only one kind of molecules
Two or more kinds of molecules
Different types of molecules
Which of the following property is not considered when the components of a mixture is separated ?
Density
Energy - change
Volatile nature
Boiling point
We separate mixtures to
Remove unwanted components
To get pure substances
Both the above
None of these
From the following which one is not a mixture.
Alum
A platinum bangle
A gold chain of 22 ct.
Blank ink
When distilled water is evaporated
Some salt is left behind
Some sand in left behind
Some oil is left behind
Nothing is left behind
