Question

List down useful products from the following separation techniques: filtration, evaporation, decantation, sieving, using magnet.

1) Filtration: Separation of solid particles from a liquid or gas.
2) Evaporation: Separation of a solvent from a solution by heating.
3) Decantation: Separation of a liquid from a solid by pouring off the liquid.
4) Sieving: Separation of particles of different sizes using a sieve.
5) Using Magnet: Separation of magnetic substances from non-magnetic substances.

Answer 1

Separation techniques like filtration, evaporation, decantation, sieving, and using magnets are used to produce useful products by leveraging physical and chemical properties of the substances. Examples include water purification, salt extraction, wine clarification, food preparation, and material recycling or mining.

Step-by-step explanation:

The separation techniques mentioned are integral to both our everyday lives and various industrial processes. They are based on physical and chemical differences in the substances being separated.

• Filtration: Used to produce clean water by removing solid impurities, like when sand and rocks are filtered out to purify water. In the laboratory, it is used to separate solids from liquids in a mixture.
• Evaporation: Generally used to obtain a dissolved substance by evaporating the liquid. An example is obtaining salt from saltwater.
• Decantation: This technique is often used in wine production to separate sediment from the liquid, thus clarifying the wine. It can also be used to separate oil and water.
• Sieving: Commonly used in the food industry, like separating flour from larger impurities or in mining to sort particles of different sizes.
• Using Magnet: This technique can separate magnetic materials like iron from non-magnetic materials in recycling processes or in mining to extract iron ore.