Methods of Separating Substances

What is the main purpose of filtration?

• To increase the temperature of gases.

• The main purpose of filtration is to separate solids from liquids or gases.

• To combine different types of solids.

• To enhance the flavor of liquids.

Which technique is used to separate solids from liquids?

• Filtration

• Evaporation

• Centrifugation

• Distillation

What is the process of evaporating a liquid to leave behind solids called?

• Sublimation

• Filtration

• Condensation

• Evaporation

How does magnetic separation work?

• Magnetic separation is a process that uses sound waves to sort materials.

• Magnetic separation relies on chemical reactions to separate substances.

• Magnetic separation uses heat to melt materials together.

• Magnetic separation uses magnets to separate magnetic materials from non-magnetic ones.

What type of materials can be separated using a magnet?

• Wood and paper products

• Glass and ceramics

• Plastic materials like PVC

• Ferromagnetic materials such as iron, nickel, and cobalt.

What is decantation used for?

• Decantation is used to separate mixtures, such as liquids from solids or immiscible liquids.

• To mix different types of liquids thoroughly

• To heat liquids for faster evaporation

• To filter out impurities from a solution

Describe the process of decantation in simple terms.

• Decantation involves boiling a liquid to separate its components.

• Decantation is the process of mixing two liquids thoroughly.

• Decantation is the process of separating a liquid from solid particles or another liquid by carefully pouring it off.

• Decantation is the method of filtering solid particles from a liquid using a sieve.

What is the main difference between filtration and sieving?

• Filtration uses heat, while sieving uses pressure.

• Filtration is used for cooking, while sieving is for cleaning.

• Filtration separates liquids from gases, while sieving separates liquids from solids.

• Filtration separates solids from fluids, while sieving separates particles based on size.

Which method would you use to separate sand from water?

• Evaporation

• Centrifugation

• Filtration

• Distillation

What is the role of heat in evaporation methods?

• Heat increases the energy of liquid molecules, enabling them to evaporate.

• Heat cools the liquid, preventing evaporation.

• Heat has no effect on the evaporation process.

• Heat decreases the energy of liquid molecules.