Pure Substances and Mixtures
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rhouse
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  • Question 1
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    Q.

    A _________________ mixture is one where the substances are evenly spread throughout.

    answer choices

    heterogeneous

    homogeneous

    pure substance

  • Question 2
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    Q.

    A ______________ mixture is one that does not have a uniform composition.

    answer choices

    heterogeneous

    homogenous

    pure substance

  • Question 3
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    Q.

    A _____________ contains a variety of elements and compounds that are not chemically combined with each other.

    answer choices

    compound

    element

    molecule

    mixture

  • Question 4
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    Q.

    A __________________ is a substance that has a fixed composition and definite properties such as appearance, melting point, and reactivity.

    answer choices

    mixture

    pure substance

  • Question 5
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    Q.

    Fruit Loops, pizza, and Skittles are examples of ____________________ mixtures.

    answer choices

    heterogeneous

    homogeneous

    pure

  • Question 6
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    Q.

    Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

    answer choices

    heterogeneous

    homogeneous

    pure

  • Question 7
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    Q.

    Which of these is a mixture?

    answer choices

    Laundry Detergent

    Salt (NaCl)

    Oxygen (O)

    Fluorine (Fl)

  • Question 8
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    Q.

    Air is:

    answer choices

    An element

    A compound

    A mixture

    None of these

  • Question 9
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    Q. The picture shown here is what type of mixture?
    answer choices
    homogeneous
    hetergeneous
    pure substance
    element
  • Question 10
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    Q.

    What is this?

    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous MIxture

  • Question 11
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    Q.

    What is this?

    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous Mixture

  • Question 12
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    Q.

    What is this?

    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous Mixture

  • Question 13
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    Q. Milk
    answer choices
    Heterogeneous mixture
    Homogeneous mixture
  • Question 14
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    Q. Chicken noodle soup
    answer choices
    heterogeneous mixture
    homogeneous mixture
  • Question 15
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    Q.

    What is this?

    answer choices

    Element

    Compound

    Heterogeneous MIxture

    Homogeneous Mixture

  • Question 16
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    Q.
    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous MIxture

  • Question 17
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    Q.

    What is it?

    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous Mixture

  • Question 18
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    Q.

    What is it?

    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous Mixture

  • Question 19
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    Q.

    What is it?

    answer choices

    Element

    Compound

    Homogeneous Mixture

    Heterogeneous Mixture

  • Question 20
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    Q.

    What is it?

    answer choices

    Pure Substance

    Mixture

  • Question 21
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    Q.

    What is it?

    answer choices

    Pure Substance

    Mixture

  • Question 22
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    Q.

    What is it?

    answer choices

    Pure Substance

    Mixture

  • Question 23
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    Q.

    What is it?

    answer choices

    Pure Substance

    Mixture

  • Question 24
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    Q.
    answer choices

    Pure Substance

    MIxture

  • Question 25
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    Q.

    Dry ice is solid carbon dioxide, or CO2. Dry ice may be used as a cooling agent and contains two oxygen atoms bonded to a carbon atom. Dry ice is a ___________________ .

    answer choices

    pure substance

    mixture

  • Question 26
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    Q.

    Instant coffee is made by dissolving a powder in hot water. Instant coffee is a ___________________ .

    answer choices

    pure substance

    mixture

  • Question 27
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    Q.

    Baking soda is the common name for sodium bicarbonate, or NaHCO3. It can be produced through chemical reactions involving carbon dioxide and sodium hydroxide.

    answer choices

    pure substance

    mixture

  • Question 28
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    Q.

    Cake batter is a substance that may contain flour, eggs and sugars mixed by hand or with an electric mixer. Cake batter is a ___________________ .

    answer choices

    pure substance

    mixture

  • Question 29
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    Q.

    Blood is a fluid found in the bodies of humans and other animals. It can be physically separated into plasma, red blood cells and white blood cells. Blood is a ___________________

    answer choices

    pure substance

    mixture

  • Question 30
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    Q.

    Methane contains one atom of carbon and four atoms of hydrogen that are chemically bonded. It is a main component of natural gas. Methane is a ___________________ .

    answer choices

    pure substance

    mixture

  • Question 31
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    Q.

    Nickel has the chemical symbol Ni and atomic number 28. It is a silvery-white metal and cannot be broken down physically or chemically into a more simple substance. Nickel is a ___________________ .

    answer choices

    element

    compound

  • Question 32
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    Q.

    Ammonia is a colorless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia is a ___________________ .

    answer choices

    element

    compound

  • Question 33
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    Q.

    The noble gases are a group of six substances with similar properties. They are odorless, colorless gases with low reactivity. They are group 18 on the periodic table. Each noble gas is a(n) _______ .

    answer choices

    element

    compound

    heterogeneous mixture

    homogenous mixture/solution

  • Question 34
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    Q.

    Granite is an igneous rock that contains the minerals quartz, feldspar, mica and others. The exact composition will vary from sample to sample. Granite is a(n) _______ .

    answer choices

    element

    compound

    heterogeneous mixture

    homogenous mixture/solution

  • Question 35
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    Q.

    Chex mix contains pretzels, rye chips and chex cereal. It is an example of a(n)

    answer choices

    solution/ homogeneous mixture

    heterogeneous mixture

    element

    compound

  • Question 36
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    Q.

    Air is:

    answer choices

    An element

    A compound

    A mixture

    None of these

  • Question 37
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    Q.

    Which of the following is classified as a pure substance?

    answer choices

    Lemonade

    Air

    Steel ( metal alloy)

    Helium

  • Question 38
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    Q. This diagram represents a _____.
    answer choices
    pure substance that is a compound
    mixture of elements
    pure substance that is an element
    mixture of compounds
  • Question 39
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    Q.

    Oxygen

    answer choices

    Pure Substance

    Mixture

  • Question 40
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    Q.

    Salt(NaCl)

    answer choices

    Mixture

    Pure Substance

  • Question 41
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    Q.

    Saltwater

    answer choices

    Mixture

    Pure Substance

  • Question 42
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    Q.

    Sand

    answer choices

    Homogeneous Mixture

    Pure Substance

    Heterogenous Mixture

  • Question 43
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    Q.

    Air

    answer choices

    Homogeneous mixture

    Heterogeneous mixture

    Pure Substance

  • Question 44
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    Q.

    Chicken noodle soup

    answer choices

    Homogeneous mixture

    Heterogeneous mixture

    Pure Substance

  • Question 45
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    Q.

    Vinegar (Acetic Acid and Water)

    answer choices

    Homogeneous mixture

    Heterogeneous mixture

    Pure Substance

  • Question 46
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    Q.

    Which of the following materials should be classified as a mixture?

    answer choices

    Air

    Gold

    Salt

    Water

  • Question 47
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    Q.

    A bottle of dishwashing detergent contains a clear, viscous liquid. The label has a long list of ingredients, including water, sodium lauryl sulfate, fragrance, and Blue dye #5.

    What can you infer about the material in the bottle from this label and the appearance of the liquid?

    answer choices

    It is a pure substance.

    It is a compound.

    It is a heterogeneous mixture.

    It is a homogeneous mixture.

  • Question 48
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    Q.

    Which is an example of a container filled with a pure substance?

    answer choices

    a glass of iced tea

    a bucket of salt water

    a tire filled with air

    a balloon filled with helium

  • Question 49
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    Q.

    Which is a mixture of compounds?

    answer choices
  • Question 50
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    Q.

    Which is a pure substance?

    answer choices
  • Question 51
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    Q. Describe this sample
    answer choices
    Pure element
    Pure compound
    Mixture of elements
    Mixture of compounds
  • Question 52
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    Q. Describe this sample
    answer choices
    Pure compound
    Mixture of elements
    Mixture of compounds
    Mixture of elements and compounds
  • Question 53
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    Q.

    Classify this substance?

    answer choices

    Homogeneous Mixture

    Heterogenous Mixture

    Pure Substance

  • Question 54
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    Q.

    Why are elements and compounds called pure substances?

    answer choices

    They are only made up of one particular kind of an atom

    They have indefinite compositions (made up of different type of atoms)

    They have definite compositions (made up of one type of atom or one type of molecule)

    None of these

  • Question 55
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    Q.

    What type of substance is tap water?

    answer choices

    pure substance

    colloid

    homogeneous mixture

    heterogeneous mixture

  • Question 56
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    Q.

    Only one of the following substances is a pure substance. Which one?

    answer choices

    gold

    air

    tap water

  • Question 57
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    Q.

    What type of substance is an alloy, for instance, bronze?

    answer choices

    pure substance

    homogeneous mixture

    heterogeneous mixture

  • Question 58
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    Q.

    Is a golden ingot a pure substance?

    answer choices

    Yes, it is.

    No, it isn't

  • Question 59
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    Q.

    bronze, steel and stainless steel have something in common...

    answer choices

    They have nothing in common.

    All of them are homogeneous mixtures

  • Question 60
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    Q.

    Classify this gold ingot?

    answer choices

    Pure substance

    Homogenous Mixture

    Heterogenous Mixture

  • Question 61
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    Q.

    What type of substance is an alloy, for instance, bronze?

    answer choices

    pure substance

    homogeneous mixture

    heterogeneous mixture

  • Question 62
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    Q.

    What type of substance is bleach? Hint: It is a substance ( NaClO) dissolved in water.

    answer choices

    a pure substance

    a homogeneous mixture

  • Question 63
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    Q.

    What type of substance is vinegar? Hint: It is a substance (acetic acid) dissolved in water.

    answer choices

    It is a pure substance.

    It is a homogenous mixture.

  • Question 64
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    Q.

    The picture shows sulphur and iron filings. We can distinguish both substances. So we say it is...

    answer choices

    a homogenous mixture.

    a heterogeneous mixture

    pure substance

  • Question 65
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    Q.

    A substance can be represented by a formula; for instance  H2OH_{2_{ }}O  . Then, it is a...

    answer choices

    homogenous mixture

    heterogeneous mixture

    a compound (a kind of pure substance)

  • Question 66
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    Q.

    A substance is made up of atoms of one element; for instance ozone is made up of atoms of oxygen (only oxygen). Then, ozone is a...

    answer choices

    an element (a kind of pure substance)

    a compound (a kind of pure substance)

    a homogenous mixture

    a heterogeneous mixture

  • Question 67
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    Q.

    Which of the following is not a pure substance?

    answer choices

    Gold

    stainless steel

    sucrose

    Table salt

  • Question 68
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    Q.

    Which of the following is a pure substance?

    answer choices

    chlorine

    Brass

    Wood

    air

  • Question 69
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    Q. What is an example of a mixture?
    answer choices
    iron
    ice
    soil
    gold
  • Question 70
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    Q.

    What type of substance does the model represent?

    answer choices

    element

    compound

    homogeneous mixture

    heterogeneous mixture

  • Question 71
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    Q. Ocean water is a __________ mixture
    answer choices
    Homogeneous
    Heterogeneous
  • Question 72
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    Q. Pepsi is a . . .
    answer choices
    Heterogeneous mixture
    homogeneous mixture
    Element
    Compound
  • Question 73
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    Q. Italian Salad Dressing is a . . .
    answer choices
    heterogeneous mixture
    homogeneous mixture
    Pure Substance
    Compound
  • Question 74
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    Q. This picture represents which of the following?
    answer choices
    element
    compound
    mixture
  • Question 75
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    Q. Type of mixture that has the SAME COMPOSITION in every part.
    answer choices
    Homogenous
    Heterogeneous
  • Question 76
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    Q. Type of mixture that DOESN'T HAVE the same composition in every part.
    answer choices
    Homogeneous
    Heterogeneous
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