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- 1. Multiple Choice
The process of settling down of particles of a solid in a liquid is
Sublimation
Sedimentation
Filtration
Decantation
- 2. Multiple Choice
The solubility ____________ with increase in temperature.
doesn't change
decreases
increases
- 3. Multiple Choice
While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?
Threshing
Sieving
Winnowing
Filtration
- 4. Multiple Choice
What is the process that is used to separate grains from stalks called?
handpicking
threshing
sieving
winnowing
- 5. Multiple Choice
When is the solution saturated?
No more salt can be dissolved in the amount of water we have taken
Lot more salt can be added
You have to add some sugar into the solution
None of the above
- 6. Multiple Choice
When is the solution saturated?
No more salt can be dissolved in the amount of water we have taken
Lot more salt can be added
You have to add some sugar into the solution
None of the above
- 7. Multiple Choice
The diagram shows the apparatus for separating soil and water. What are the labelled parts?A = distillate, B = filtrateA = filtrate, B = residueA = residue, B = filtrateA = residue, B = distillate - 8. Multiple Choice
Which separation technique uses the apparatus shown in the diagram?
filtration
evaporation
distillation
chromatography
- 9. Multiple ChoiceWhat is the boiling point of water?0oC100oC80oC95oC
- 10. Multiple ChoiceFiltration can be used to separate...an insoluble solid from a solutiona soluble solid from a solutiona dissolved solid from a solution
- 11. Multiple Choice
What separation technique does the picture show?
Sieving
filtering
magnetic separation
Distillation
- 12. Multiple Choice
What is the purpose of Filtration?
Separating and insoluble solid from a liquid
Separation of a mixture of 2 solids
Separates heavier substances from a suspension
- 13. Multiple Choice
Which of the following is essential to perform winnowing activity?
Wind
Water
Magnet
Filter paper
- 14. Multiple ChoiceIron and copper screws could be separated using a magnet becauseiron is magnetic, copper is notcopper is magnetic, iron is notneither metal is magneticcopper screws are heavier than iron and fall off the magnet
- 15. Multiple Choice
This method ______________can
be used for separating slightly larger
sized impurities like the pieces of dirt,
stone, and husk from wheat, rice or
pulses.
Handpicking
Threshing
Winnowing
Sieving
Filtration
- 16. Multiple Choice
In ________ the stalks are beaten to free
the grain seeds.
Winnowing
Threshing
Sieving
Filtration
- 17. Multiple Choice
In a________, impurities like a husk
and stones are removed from wheat
before grinding it.
Flour Mill
Separation Mill
Substances Association
Both flour and Separation mill
- 18. Multiple Choice
When the heavier component in a
mixture settles after water is added to
it, the process is called _______________.
Sedimentation
Decantation
Filtration
Winnowing
- 19. Multiple Choice
The process of conversion of water
into its vapour is called ____________.
Decantation
Sedimentation
Filtration
Evaporation
- 20. Multiple Choice
Common salt is then
obtained from this mixture of salts by
further ________________.
Decanataion
Sedimentation
Purification
Condensation
- 21. Multiple Choice
When the steam comes in contact
with the metal plate cooled with ice, it
__________and forms liquid water.
Purification
Sedimentation
Filtration
Condensation
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