Chemistry Test: Trivia Quiz On Methods Of Separating Mixtures!

Melting refers to the process of transitioning from a solid state to a liquid state.

Freezing is the process in which a substance changes its state from a liquid to a solid. During freezing, the molecules of the substance slow down and come closer together, forming a rigid structure. This results in the substance having a fixed shape and volume, characteristic of a solid.

To separate salt from water, one effective method is to evaporate the water. When the solution is heated, the water molecules gain enough energy to escape into the air as water vapor, leaving the salt behind. This process is known as evaporation. As a result, the salt can be obtained in its solid form once the water has completely evaporated.

Jo can use a magnet to separate the iron filings from the sand because iron is magnetic while sand is not. By moving the magnet over the mixture, the iron filings will be attracted to the magnet and can be easily separated from the sand. This method takes advantage of the magnetic properties of the iron filings to selectively separate them from the non-magnetic sand particles.

Condensing refers to the process of a substance changing its state from a gas to a liquid. This is evident in the hint provided, where dew, which is water vapor in the air, condenses into liquid droplets on the grass. Therefore, the correct answer is "liquid".

By evaporating the water, the dissolved substance can be separated from the water. When water is heated, it turns into vapor and leaves behind the dissolved substance, which does not evaporate. This process is called evaporation. By collecting the water vapor and condensing it back into liquid form, the dissolved substance can be obtained separately from the water.

Evaporation is the process in which a liquid substance changes into a gaseous state. It occurs when the molecules of the liquid gain enough energy to overcome the attractive forces holding them together, causing them to escape into the surrounding space as gas. This transformation is driven by heat, as the increase in temperature provides the necessary energy for the liquid molecules to become vapor and disperse into the atmosphere. Therefore, the correct answer is "gas."

When rain falls, it is because the water vapor in the clouds is condensing into liquid water. Water vapor in the atmosphere cools and forms tiny droplets or ice crystals, which then come together to form raindrops. Hydrogen and oxygen are the elements that make up water, but they do not exist as separate entities in the atmosphere. Therefore, the correct answer is water.

The process described involves pouring the cooked mixture through muslin fabric to separate the solid bits from the liquid bits. This is known as filtering, as the liquid is able to pass through the tiny holes in the muslin fabric while the solid bits are retained.

Decanting, filtering, and evaporating are all methods of separating a solid from a liquid. Decanting involves carefully pouring off the liquid while leaving the solid behind. Filtering uses a porous material to separate the solid particles from the liquid. Evaporating involves heating the mixture to evaporate the liquid, leaving the solid behind. Dissolving, on the other hand, is not a method of separating a solid from a liquid, but rather a process of mixing a solid into a liquid to form a solution.

The act of pouring off the water after boiling the potatoes is an example of decanting. Decanting is the process of separating a liquid from a solid by carefully pouring off the liquid, leaving the solid behind. In this case, the liquid hot water is being separated from the solid potatoes by pouring it off, which is exactly what decanting entails.

Water is not a mixture because it is a pure substance. A mixture is formed when two or more substances are combined physically, but water is composed of only one type of molecule, H2O. It does not contain any other substances or particles. Therefore, water is not a mixture.

Decanting is the process of separating a mixture by pouring off the liquid portion while leaving the solid portion behind. In the case of coffee in hot water, the coffee particles dissolve in the water, forming a homogeneous mixture. Since there are no solid particles to separate, decanting would not be an effective method. Therefore, coffee in hot water could not be separated into its components by decanting.

The method of mixing the mixture with water and then filtering it is the correct answer because it allows for the separation of the insoluble solid from the soluble solid. When the mixture is mixed with water, the soluble solid will dissolve in the water, while the insoluble solid will remain as a solid. By filtering the mixture, the insoluble solid can be separated from the liquid. Finally, by evaporating the water from the resulting liquid, the soluble solid can be obtained in its solid form, further confirming the effectiveness of this method for separation.

The given scenario describes the process of filtering. The dirty water is poured into a funnel with a paper lining, which acts as a filter. As the water passes through the paper, the solid dirt particles are trapped, and only clean water flows out into the beaker. This separation of the solid dirt from the water is a characteristic of the filtering process. Sieving, on the other hand, involves the separation of particles of different sizes using a sieve or mesh, which is not applicable in this scenario.