The method that is used to separate water particles from cloths while drying in washing machines is
Magnetic separation
Filtration
Evaporation
Centrifugation
Which of the following mixtures will be the most difficult to separate ?
Iron filings + sand
Sand + water
Saw dust + stones
Nitrogen + hydrogen
A pure substance is made up of
Only one kind of molecules
Two or more kinds of molecules
Different types of molecules
None
You can use decantation to separate
Two miscible liquids
Two immiscible liquids
Two metals in an alloy
Solid- solid water
Pure substances possess
Variable melting points and boiling points
Nonuniform
Variable properties
Fixed melting points and boiling points
Choose the substance that shows sublimation
Napthalene
Toluene
Kerosene
Water
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
To separate ammonium chloride from common salt, we use
Sedimentation
Sieving
Sublimation
To separate a mixture of two or more gases ______ method is used
Liquification
Distillation
Decantation
Which of the following is not a homogenous mixture/
sugar solution
salt solution
iron fillings in sand
none of these
