Methods Of Separating Mixture Quiz

Explanation
A colloid is a type of mixture where small particles are dispersed throughout a medium, but they are not dissolved. In this case, the particles in the mixture cannot be seen, but they do reflect light, indicating that they are larger than the particles in a solution. Therefore, the correct classification for this mixture would be a colloid.

Explanation
Salt dissolved in water is a solution, therefore salt is not chemically bonded to water. The ratio of salt to water may vary, indicating that the quantity of salt to water is not fixed. Additionally, salt and water retain their own chemical properties even when they are in solution.

Explanation
Homogeneous solutions are uniform mixtures where the components are evenly distributed at a molecular level. Sugar water is a homogeneous solution because the sugar molecules are evenly dispersed throughout the water molecules. Air is also a homogeneous solution because it is a mixture of gases (such as nitrogen, oxygen, carbon dioxide) that are uniformly distributed. On the other hand, peanuts and water, an unopened soft drink, and cement are not homogeneous solutions as they consist of distinct components that are not uniformly mixed.

Explanation
Steel is a mixture because it is composed of two or more substances, mainly iron and carbon. The carbon content in steel can vary, resulting in different types of steel with varying properties. This combination of iron and carbon gives steel its strength and durability, making it suitable for various applications in construction, manufacturing, and other industries.

Explanation
Distillation is a process used to separate solutions. Solutions are mixtures where a solute is dissolved in a solvent. In distillation, the mixture is heated to vaporize the solvent, and then the vapor is condensed back into a liquid. Since the solute remains behind in the original container, the distillation process effectively separates the solute from the solvent, allowing for the purification or concentration of the desired substance. Therefore, distillation is commonly used in various industries, such as the production of alcoholic beverages, petroleum refining, and water purification.

Explanation
Mixtures, such as sugar in water, are not given chemical formulas because no chemical bonding took place and the elements or compounds in the mixtures have no definite proportions. In a mixture, the substances are simply physically mixed together without any chemical reaction occurring. Therefore, the elements or compounds in the mixture retain their individual properties and do not combine to form a new substance with a specific chemical formula. Additionally, the proportions of the elements or compounds in the mixture can vary, unlike in compounds where the elements are present in fixed ratios.

Explanation
Suspension is a type of mixture that contains the largest particles. In a suspension, the particles are large enough to be visible to the naked eye and do not dissolve or settle easily. They are suspended in a liquid or gas and can be separated by filtration or settling. This is different from a solution, where the particles are very small and evenly distributed, and a colloid, where the particles are intermediate in size and do not settle easily. The size of particles in a mixture can vary depending on the composition, but in general, suspensions have the largest particles.

Explanation
The given scenario describes a mixture in which a solid and a liquid are shaken together to produce a milky mixture that eventually separates into a clear liquid and a white solid. This indicates that the solid particles are not dissolved completely in the liquid but rather remain suspended in it. Therefore, the best description for this mixture is a suspension. In a suspension, the particles are larger and do not dissolve, causing them to settle over time.

Explanation
The yellow powder and blue liquid are able to dissolve in each other, forming a clear green liquid. This indicates that the substances are soluble in each other, meaning they can mix and form a homogeneous solution.

Explanation
Homogeneous and heterogeneous mixtures differ in the uniformity of their composition. In a homogeneous mixture, the components are evenly distributed and indistinguishable, giving the appearance of a single phase. In contrast, a heterogeneous mixture has visibly different components that are not evenly distributed. The given statement is incorrect because chemical bonds are not formed in either type of mixture. Chemical bonds involve the sharing or transfer of electrons between atoms, which is not a characteristic of mixtures.

Explanation
Screening would be the best method to separate a mixture of sand and stones. Screening involves passing the mixture through a sieve or mesh, allowing the smaller particles (in this case, sand) to pass through while retaining the larger particles (stones). This method is effective in separating particles based on their size, making it suitable for separating a mixture of sand and stones.

Explanation
Salty water could not be separated by filtration because filtration is a process that separates solid particles from a liquid by passing the mixture through a filter. In the case of salty water, the salt is dissolved in the water and cannot be filtered out as it is in a dissolved state. Filtration is only effective for separating insoluble solids from liquids.

Explanation
This statement is true because physical processes can be used to separate mixtures. Physical processes such as filtration, distillation, evaporation, and chromatography can be employed to separate the different components of a mixture based on their physical properties such as size, boiling point, solubility, or density. These processes do not involve any chemical reactions and can be reversed, allowing the components of the mixture to be recovered in their original form. Therefore, it is possible to separate mixtures using physical processes.