Chemistry Quiz: Methods For Separating Mixtures!

Reviewed by Zohra Sattar Waxali
Zohra Sattar Waxali, PhD (Chemistry) |
Chemistry
Review Board Member
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.
 , PhD (Chemistry)
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  • 1/15 Questions

    Freezing means going from a liquid to a ____________.[Choose from: liquid, solid, gas]

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About This Quiz

Dive into the fascinating world of chemistry with our "Methods for Separating Mixtures" quiz! Test your knowledge of various techniques used to separate different components in mixtures. From filtration to distillation, this quiz covers a range of methods essential in chemistry labs. Challenge yourself with questions on sieving, chromatography, and more. Whether you're a chemistry enthusiast or a student studying the subject, this quiz offers a fun way to explore the diverse world of separation techniques. Sharpen your understanding of chemical processes and see how well you can decipher the art of isolating substances within mixtures!

Chemistry Quiz: Methods For Separating Mixtures! - Quiz

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  • 2. 

    Melting means going from a __________ to a liquid.[Choose from: liquid, solid, gas]

    Explanation
    Melting is the process by which a solid substance changes into a liquid state. When a solid is heated to its melting point, the particles gain enough energy to overcome the forces holding them in a fixed arrangement, causing them to move more freely and become a liquid. Therefore, the correct answer is "solid".

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  • 3. 

    Evaporation means going from a liquid to a ____________.[Choose from: liquid, solid, gas]

    Explanation
    Evaporation is the process by which a liquid changes into a gas. This occurs when the molecules of the liquid gain enough energy to break free from their intermolecular bonds and escape into the air. Therefore, the correct answer is gas.

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  • 4. 

    Condensing means going from a gas to a ____________.[Choose from: liquid, solid, gas]  HINT! Dew is water condensing out of the air onto the grass.

    Explanation
    When a substance condenses, it changes its physical state from a gas to a liquid. This process typically occurs when the temperature of the gas is lowered, causing the gas particles to lose energy and come closer together, forming a liquid.

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  • 5. 

    If Jo wants to get the iron filings out of some sand, what could she use to separate these two solids?

    • A magnet

    • Evaporation

    • Decanting

    Correct Answer
    A. A magnet
    Explanation
    Jo can use a magnet to separate the iron filings from the sand because iron is magnetic. By running a magnet through the mixture, the iron filings will be attracted to the magnet and can be easily separated from the sand. This method is effective for separating mixtures of solids when one of the components is magnetic.

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  • 6. 

    To get salt out of a solution (separating salt from water) we could try.....

    • Melting it

    • Distilling the solution

    • Using a magnet

    • Eviserating the water off

    • Using the solute to redissolve it

    Correct Answer
    A. Distilling the solution
    Explanation
    The most effective method to separate salt from water is to distill the solution. This process involves heating the solution, causing the water to turn into vapor and leave the salt behind. As the water evaporates, the salt crystals become more concentrated until they are left as a solid residue. This method takes advantage of the difference in boiling points between water and salt, allowing for the separation of the two substances. The water vapor then condenses on the cold finger of the distillation apparatus and then drips down into a collection flask, allowing pure water to be recovered. 

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  • 7. 

    If salt has been dissolved in water, how could I separate it from the water again?

    • By decanting it

    • By evaporating the water

    • By dissolving it in milk

    Correct Answer
    A. By evaporating the water
    Explanation
    Evaporating the water is a correct method to separate salt from water. This process involves heating the saltwater solution to allow the water to evaporate, leaving behind the salt as a solid residue.

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  • 8. 

    I am making lip balm. I have to pour my cooked mixture through some muslin (fabric). What am I doing to the mixture? [I am separating the solid bits from the liquid bits: the liquid can fit through the tiny holes in the muslin fabric]

    • Decanting it

    • Mixing it

    • Filtering it

    • Serrating it

    • Nothing

    Correct Answer
    A. Filtering it
    Explanation
    The process described involves passing the cooked mixture through muslin fabric, which acts as a filter. The tiny holes in the fabric allow the liquid portion of the mixture to pass through while separating the solid bits. Therefore, the correct answer is "filtering it."

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  • 9. 

    If I pour the water off after I boil the potatoes, what is this an example of? [I am separating the solid potatoes from the liquid hot water]

    • Decoutage

    • Deglazing

    • Double glazing

    • Decanting

    • Decarting

    Correct Answer
    A. Decanting
    Explanation
    This is an example of decanting. Decanting is the process of carefully pouring off a liquid from a mixture, while leaving the solid behind. In this case, after boiling the potatoes, the hot water is being separated from the solid potatoes by pouring off the water.

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  • 10. 

    Which of these are methods of separating a solid from a liquid?

    • Decanting, filtering and dissolving

    • Decanting, filtering and evaporating

    • Decanting and dissolving

    Correct Answer
    A. Decanting, filtering and evaporating
    Explanation
    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 filter to separate the solid particles from the liquid. Evaporating involves heating the mixture to a point where the liquid evaporates, leaving behind the solid. Dissolving, on the other hand, is not a method of separating a solid from a liquid but rather a process where a solid dissolves into a liquid to form a solution.

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  • 11. 

    When rain falls, this is because the water vapor in the clouds is condensing into liquid _________?

    • Hydrogen

    • Oxygen

    • Water

    Correct Answer
    A. Water
    Explanation
    When rain falls, it is because the water vapor in the clouds is condensing into liquid water. Water vapor, which is the gaseous form of water, rises into the atmosphere and when it cools down, it condenses back into liquid form. This process forms clouds, and when the water droplets in the clouds become too heavy, they fall as rain. Therefore, the correct answer is water.

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  • 12. 

    Which of the following is NOT a mixture?

    • Water

    • Hot chocolate made with milk

    • Coffee made up with hot water

    • A boiled sweet

    Correct Answer
    A. Water
    Explanation
    Water is not a mixture because it is a pure substance. A pure substance consists of only one type of atom or molecule, and water is made up of only water molecules (H2O). In contrast, the other options listed are mixtures because they are composed of multiple substances. Hot chocolate made with milk is a mixture of milk, cocoa powder, sugar, and other ingredients. Coffee made with hot water is a mixture of coffee beans and water. A boiled sweet is a mixture of sugar, flavorings, and other ingredients.

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  • 13. 

    Which of these methods could be used to separate an insoluble solid from a soluble solid. [HINT: soluble means WILL dissolve; insoluble means WON'T dissolve]

    • Mixing the mixture with water and then filtering it. Then we could evaporate the water from the resulting liquid.

    • Mixing the mixture with sand and then filtering it. The we could evaporate the sand from the resulting solid.

    • Mixing the mixture with hydrogen gas, and then filtering it. Then we could evaporate the solids out.

    Correct Answer
    A. Mixing the mixture with water and then filtering it. Then we could evaporate the water from the resulting liquid.
    Explanation
    The method of mixing the mixture with water and then filtering it allows the insoluble solid to be separated from the soluble solid. This is because the soluble solid will dissolve in water, forming a solution, while the insoluble solid will remain as a solid. By filtering the mixture, the insoluble solid can be retained on the filter paper while the soluble solid passes through as a solution. Evaporating the water from the resulting liquid will then allow the soluble solid to be recovered in its solid form, leaving behind the insoluble solid.

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  • 14. 

    Which of the following mixtures could NOT be separated into its components by DECANTING?

    • Beans in hot water

    • Sand in water

    • Coffee made in hot water

    Correct Answer
    A. Coffee made in hot water
    Explanation
    Decanting is a process of separating a mixture by pouring off the liquid component, leaving behind the solid component. In the case of coffee in hot water, the coffee beans are extracted by water, forming a homogeneous mixture of coffee bean extract in water. Since the coffee extract is dissolved in the hot water, the water and coffee extract cannot be separated by decanting only.

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  • 15. 

    I put dirty water into a funnel with a paper lining. Clean water comes out of the funnel into my beaker and solid dirt gets left behind on the paper. This is an example of ____________

    Correct Answer
    Filtration, filtering, filtration, Filtering
    Explanation
    Filtration is a process used to separate solids from liquids by passing the mixture through a filter, like the paper lining in this case. The solid dirt is trapped by the filter paper, while the clean water passes through into the beaker. This is a common method for separating mixtures based on particle size.

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Zohra Sattar Waxali |PhD (Chemistry) |
Chemistry
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.

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  • Current Version
  • Sep 08, 2024
    Quiz Edited by
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    Expert Reviewed by
    Zohra Sattar Waxali
  • Oct 09, 2009
    Quiz Created by
    Hrobinson
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