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
Choose the substance that shows sublimation
Napthalene
Toluene
Kerosene
Water
The following property is used to find the purity of a substance
Specific gravity
Volume
Temperature
Mass
To separate ammonium chloride from common salt, we use
Filtration
Sedimentation
Sieving
Sublimation
From the following which one is not a mixture.
Alum
A platinum bangle
A gold chain of 22 ct.
Blank ink
Wheat flour is separated from wheat bran by the method of
Hand picking
Winnowing
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
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
A pure substance is made up of
Only one kind of molecules
Two or more kinds of molecules
Different types of molecules
None
