Choose the substance that shows sublimation
Napthalene
Toluene
Kerosene
Water
You can use decantation to separate
Two miscible liquids
Two immiscible liquids
Two metals in an alloy
Solid- solid water
A pure substance is made up of
Only one kind of molecules
Two or more kinds of molecules
Different types of molecules
None
Wheat flour is separated from wheat bran by the method of
Hand picking
Sieving
Winnowing
Filtration
Some iron fillings are mixed with sand. We can separate thm using magnetic separation method. This method is applicable only when
Magnetic substances are mixed up with non magnetic substances
Magnetic substances are mixed up with magnetic substances
Magnetic substances are heated beyond their curie temperatures
Two magnetic substances have equal melting points
The following property is used to find the purity of a substance
Specific gravity
Volume
Temperature
Mass
Sieving can be used only when the components of the mixture have
Different sizes
Different melting points
Different boiling points
Different specific gravities
A compound has
Only one kind of atom
Only one kind of element
A mixture of elements and molecules
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
