Some iron fillings are mixed with sand. We can separate them 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
Which among the following is used to separate a mixture of solids?
Sedimentation
Filtration
Sieving
Condensation
........ is used to separate pebbles and stones from sand at the construction sites.
Filter paper
Sieve
Condenser
None of the above
During the sedimentation process, the clear liquid above the sediment is a called .........
residue
filtrate
supernatant liquid
none of the above
Wheat flour is separated from wheat bran by the method of
Hand picking
Winnowing
Which of the following mixtures could not be separated into its components by decanting?
Beans in hot water
Sand in water
Coffee in hot water
' Combine ' is used in which of the following.
Threshing
The following property is used to find the purity of a substance
Specific gravity
Volume
Temperature
Mass
Handpicking method can be applied only when the quantity is
small
high
both (1) and (2)
Cannot be predicted
In evaporation, water changes into
ice
oxygen
air
vapour
