Separating Solutions and Mechanical Mixtures

Which technique cannot be used to separate a mechanical mixture?
1. Evaporation
2. Magnetism
3. Sorting
4. Sifting
Cheese is made by curdling milk into curds and whey. The solid curds are separated from the whey by which process?
1. Filtration
2. Chromatography
3. Evaporation
4. Sifting
Which characteristic makes paper chromatography possible?
1. Solvent particles are attracted to paper
2. Gravity pulls the solvent down through the paper
3. The sample tested is not soluble in the solvent
4. The paper filters the sample liquid
Why do solvent particles leave a solution when it evaporates?
1. They have enough energy to escape the liquid's surface
2. The solvent particles are repelled by the solute particles
3. The solvent particles are bounced out of solution by particle movement
4. Air molecules have a strong attraction for solvent particles
A gardener would like to create lavender oil from her lavender plants.

She mashes flowers into a paste, which contains the lavender oil she wants mixed with a watery pulp of plant fibers she doesn't want. What list of processes would allow her to isolate the lavender oil she wants?
1. Filtration followed by distillation
2. Filtration followed by paper chromatography
3. Sifting followed by evaporation
4. Sorting followed by filtration
A man who has constructed a lovely fish pond in his backyard has a problem: The stones he used to line the pond have developed an ugly white deposit of various salts around the edges that is visible when the water level falls during a dry spell. Which process is the most likely culprit?
1. Evaporation
2. Distillation
3. Chromatography
4. Filtration
A combine is used to harvest wheat and other grains.

Once the grain stalks are cut and fed into the machine a threshing drum with a meshed grill allows the grain and smaller debris fall through while the straw is left inside and deposited back onto the field. What type of separation technique is used here?
1. Sifting
2. Magnetism
3. Distillation
4. Filtration
A company would like to come up with a way to remove tiny pieces of radioactive metal contaminants from the wastewater generated by its nuclear power plant. Which method would be most useful?
1. Filtration
2. Sifting
3. Stirring
4. Sorting
A recycling company would like to extract garden waste from household garbage. It has installed green bins so homeowners can collect their garden waste. What separation method is this?
1. Sorting
2. Magnetism
3. Filtration
4. Sifting
A chemist would like to extract an oil-soluble substance from a water based liquid sample. He shakes the water-based sample with an oil solvent and then allows the mixture to settle into two layers.

He then pours off one of the layers. This process is best described as which separation technique?
1. Mechanical separation
2. Distillation
3. Evaporation
4. Chromatography

Separating Solutions and Mechanical Mixtures - Section 8.3 Quiz