When distilled water is evaporated
Some salt is left behind
Some sand in left behind
Some oil is left behind
Nothing is left behind
Identify the mixture from the following
Carbon dioxide
Iron
Hydrogen
Air
Which of the following property is not considered when the components of a mixture is separated ?
Density
Energy - change
Volatile nature
Boiling point
To separate a mixture of two or more gases ______ method is used.
Sedimentation
Liquification
Distillation
Decantation
Pure substances possess
Variable melting points and boiling points
Nonuniform
Variable properties
Fixed melting points and boiling points
From the following which one is not a mixture.
Alum
A platinum bangle
A gold chain of 22 ct.
Blank ink
The process by which a solid changes directly into gas is called
Sublimation
Condensation
To separate ammonium chloride from common salt, we use
Filtration
Sieving
A mixture is a / an
Pure substance
Impure substance
Some are pure and others are impure
None
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
