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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
While preparing chapatis, Priti 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
- 3. Multiple Choice
What is the process that is used to separate grains from stalks called?
handpicking
threshing
sieving
winnowing
- 4. Multiple Choice
What separation technique does the picture show?
Sieving
filtering
magnetic separation
Distillation
- 5. Multiple ChoiceThe drops of water that appear on the outside of a glass of cold water on a warm day are an example of?sublimationcondensationevaporation
- 6. 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
- 7. 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
- 8. Multiple Choice
Which of the following is essential to perform winnowing activity?
Wind
Water
Magnet
Filter paper
- 9. Multiple Choice
The process of changing solid to gas directly is ______
Evaporation
Condensation
Melting
Sublimation
- 10. Multiple ChoiceStatement A: A mixture of cement and pebbles can be separated by using the sieve with small pores Statement B: A sieve with small pores will allow only small cement particles to pass through and will hold back the pebblesa. Statement A is true onlyb. Statement B is true onlyc. Both are falsed. Both are true
- 11. Multiple Choice
You might have observed the preparation butter from cream at home. Which method(s) can be used to separate butter from the residue?
evaporation
centrifugation
filtration
sedimentation and decantation
- 12. Multiple Choice
Sawdust is not soluble in water. If, accidentally some particles of sawdust drop into a glass of water. How would you separate them from water?
Decanting
Filtering
Sieving
Distillation
- 13. Multiple Choice
A ______________ mixture is one that does not have a uniform composition.
heterogeneous
homogenous
pure substance
- 14. Multiple Choice
A material that allows liquids to pass through it, while very small solids remain behind as residue
Filter
Sieve
Funnel
Spoon
- 15. Multiple ChoiceWhich of the following is a method of separating solutions?hand seperationfilteringscreeningevaporation
- 16. Multiple ChoiceChocolate milk is an example of ahomogeneous mixtureheterogeneous mixture
- 17. Multiple ChoiceSoil is an example of ahomogeneous mixtureheterogeneous mixture
- 18. Multiple Choice
A student collects seashells at the beach when they werre on a picnic. Teacher will not allow the student to take any sand on the bus. If the student wishes to take the seashells home he must separate the seashells from the sand. Which of the following would be most helpful when trying to separate the sand from the sea shells?
hot plate
water
sieve
magnet
- 19. Multiple Choice
A group of students in Eco club collected empty cans for recycling. They have several large bins with aluminum and steel cans, all mixed together. The two types of cans must be separated. Which of the following techniques could the students use to separate the two types of cans?
Place the cans in water, and the aluminum cans will float
Crush the cans to make them easier to carry
Test the cans for their ability to conduct electricity
Use a magnet to find and remove the steel cans
- 20. Multiple ChoiceThe separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known asdecantingevaporationloadingchromatography
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