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 a mixture of two or more gases ______ method is used
Sedimentation
Liquification
Distillation
Decantation
A mixture is a / an
Pure subtance
Impure substance
Some are pure and others are impure
None
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
A mixture contains two solids A and B. Solid A is light in weight while solid B is very heavy. Their sizes are almost same. Here, A is the unwanted component. To get pure solid B, which separation method would you suggest ?
Sieving
Winnowing
Magnetic separation
Filtration
Choose the substance that shows sublimation
Napthalene
Toluene
Kerosene
Water
To separate ammonium chloride from common salt, we use
Sublimation
You can use decantation to separate
Two miscible liquids
Two immiscible liquids
Two metals in an alloy
Solid- solid water
Wheat flour is separated from wheat bran by the method of
Hand picking
