Methods Of Separating Mixture Quiz

2.

Select all that apply. Salt dissolved in water is a solution, therefore ______.

Salt and water are chemically combined
Salt is not chemically bonded to water
The quantity of salt to water is fixed
The ratio of salt to water may vary
Salt and water retain their own chemical properties

Correct Answer(s)

A. Salt is not chemically bonded to water
A. The ratio of salt to water may vary
A. Salt and water retain their own chemical properties

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.

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1

3.

Select all that apply. Which of the following are homogenous solutions?

Sugar water
Air
Peanuts and water
An unopened soft drink
Cement

Correct Answer(s)

A. Sugar water
A. Air

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.

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4.

Which of the following is a mixture?

Steel
Water
Oxygen
Gold

Correct Answer

A. Steel

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.

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5.

Distillation is used to separate _____.

Heterogenous mixtures
Suspensions
Colloids
Solutions

Correct Answer

A. Solutions

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.

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6.

Select all that apply. Why are mixtures (such as sugar in water) not given chemical formulas?

Their elements are unknown.
No chemical bonding took place.
Mixtures do not contain compounds.
The elements or compounds in the mixtures have no definite proportions.

Correct Answer(s)

A. No chemical bonding took place.
A. The elements or compounds in the mixtures have no definite proportions.

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.

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7.

Which type of mixture contains the largest particles?

Solution
Suspension
Colloid
Varies according to the composition of the mixture

Correct Answer

A. Suspension

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.

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8.

A solid and a liquid are shaken together in a test tube to produce a milky mixture that eventually separates into a clear liquid and a white solid. Which of the following best describes the mixture?

Solution
Colloid
Suspension

Correct Answer

A. Suspension

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.

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9.

A yellow powder and a blue liquid are shaken together in a test tube to produce a clear green mixture that is all liquid. Which of the following best describes the behavior of the above pair of substances?

Soluble
Insoluble
Miscible
Immiscible

Correct Answer

A. Soluble

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.

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10.

The difference between homogenous and hetergenous mixtures is that chemical bonds are formed in homogenous mixtures.

True
False

Correct Answer

A. False

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.

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11.

Which of the following would be best to separate a mixture of sand and stones?

Magnetism
Filtration
Screening
Separation by density

Correct Answer

A. Screening

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.

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12.

Which of the following mixtures could not be separated by filtration?

Salty water
Muddy water
Orange juice with pulp in it
Dusty air

Correct Answer

A. Salty water

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.

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13.

All mixtures can be separated by physical processes.

True
False

Correct Answer

A. True

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.

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Methods Of Separating Mixture Quiz

A mixture has particles that cannot be seen but do reflect light. It should be classified as a ______.

Quiz Preview

Select all that apply. Salt dissolved in water is a solution, therefore ______.

Select all that apply. Which of the following are homogenous solutions?

Which of the following is a mixture?

Distillation is used to separate _____.

Select all that apply. Why are mixtures (such as sugar in water) not given chemical formulas?

Which type of mixture contains the largest particles?

A solid and a liquid are shaken together in a test tube to produce a milky mixture that eventually separates into a clear liquid and a white solid. Which of the following best describes the mixture?

A yellow powder and a blue liquid are shaken together in a test tube to produce a clear green mixture that is all liquid. Which of the following best describes the behavior of the above pair of substances?

The difference between homogenous and hetergenous mixtures is that chemical bonds are formed in homogenous mixtures.

Which of the following would be best to separate a mixture of sand and stones?

Which of the following mixtures could not be separated by filtration?

All mixtures can be separated by physical processes.