The method that is used to separate water particles from cloths while drying in washing machines is
Magnetic separation
Filtration
Evaporation
Centrifugation
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
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
Wheat flour is separated from wheat bran by the method of
Hand picking
Sieving
Winnowing
To separate a mixture of two or more gases ______ method is used
Sedimentation
Liquification
Distillation
Decantation
The following property is used to find the purity of a substance
Specific gravity
Volume
Temperature
Mass
A mixture is a / an
Pure subtance
Impure substance
Some are pure and others are impure
None
Choose the substance that shows sublimation
Napthalene
Toluene
Kerosene
Water
The process by which a solid changes directly into gas is called
Sublimation
Condensation
Which of the following mixtures will be the most difficult to separate ?
Iron filings + sand
Sand + water
Saw dust + stones
Nitrogen + hydrogen
