We separate mixtures to
Remove unwanted components
To get pure substances
Both the above
None of these
Which of the following mixtures will be the most difficult to separate ?
Iron filings + sand
Sand + water
Saw dust + stones
Nitrogen + hydrogen
Pure substances possess
Variable melting points and boiling points
Nonuniform
Variable properties
Fixed melting points and boiling points
A few coloured glass pieces that are big in size are mixed with sugar. The easiest way to separate them is
Heat the mixture
Add the mixture to water
Handpick the glass pieces
Handpick the sugar particles
To separate ammonium chloride from common salt, we use
Filtration
Sedimentation
Sieving
Sublimation
Winnowing is useful only when
Two solids have different melting points
Two solids have different boiling points
Two solids have different magnetic properties
Two solids have different weights
A mixture is a / an
Pure substance
Impure substance
Some are pure and others are impure
None
Choose the substance that shows sublimation
Napthalene
Toluene
Kerosene
Water
Which of the following property is not considered when the components of a mixture is separated ?
Density
Energy - change
Volatile nature
Boiling point
The following property is used to find the purity of a substance
Specific gravity
Volume
Temperature
Mass