WorksheetsSeparation of Substances
Total questions: 17
Worksheet time: 34mins
What is a saturated solution?
A solution in which more solute can be added
A solute that has no more space to dissolve a solvent
A solvent in which there is no more space there to dissolve the solute
For filtration, the particles of the insoluble solid should be (a) than the holes in the filtering device.
Sieving is used for separating two substances with ________________________ sizes.
A. Different
B. Same
C. Similar
D. Both A nd C
What can increase the solubility of a solvent?
Letting it standstill
By keeping the solvent in the freezer
By decreasing the solvent
By heating the solvent
A machine that reaps and cleans the crop
(a)
Explain the following-
Winnowing-
Beating the crop to separate grains from stalks
Separating grains from the chaff by river
Putting the grains in shallow pits and evaporate them
Separating grains from the chaff by wind
Evaporation is _________________ of condensation
similar
friend
operation
opposite
enemy
Find which is the oldest way of separating salt and seawater
By putting the seawater in a basket and picking up salt
By using filtration
By collecting seawater in shallow pits and letting the water condense
By collecting seawater in shallow pits and letting the water evaporate
What is happening in the following picture
Tea being separated from tea leaves
Putting the tea into the container
Tea used for filtration
Tea being strained
Solvent + solute=
(a)
Define the following-
Solubility-
The ability of a substance to sit still
The ability of a substance to be stirred
The ability of a substance to get dissolved
The ability of a substance to decantate
When is the separation of substances necessary?
(a)
Define-
Sieving
This method is used to differentiate substances that are of different sizes.
This method is used to separate substances that differ in weight.
This method is used to separate substances that are of different sizes.
Handpicking can only be done when the impurities are of different
sizes
colors
weight
height
Define supernatant
The liquid above the decant is called supernatant
The liquid above the filtrate is called supernatant
The liquid above the sediment is called supernatant
The pure liquid after distillation is called supernatant
Bullocks are needed for
Winnowing
Hand picking
Threshing
Sieving
Materials needed for doing evaporation and condensation activity at home?
Saltwater, tub, spoon, gas
Metal plate, refrigerated water, freshwater, container
Gas stove, kettle, metal plate, a pair of tongs, container, burner, pondwater
Seawater, Gas stove, kettle, metal plate, a pair of tongs, container, burner,
