Chemistry: Pure Substances Overview
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Questions and Answers

What defines a pure substance?

  • It is a kind of matter composed of only one or two kinds of atoms. (correct)
  • It cannot be broken down into simpler substances.
  • It consists of multiple kinds of atoms in varying proportions.
  • It is made entirely of one kind of atom.

    • Which option accurately describes the two categories of pure substances?

  • Elements and compounds (correct)
  • Solids and vapors
  • Mixtures and alloys
  • Gases and liquids

    • Which of the following statements is true about compounds?

  • They are formed by the combination of two or more different elements. (correct)
  • They are composed of single types of atoms only.
  • They cannot be broken down into simpler substances by chemical means.
  • They can exist in a gaseous state only.

    • Which of the following is NOT an example of a pure substance?

    <p>Air</p> Signup and view all the answers

    How can pure substances be classified?

    <p>Based on their elemental composition and molecular makeup.</p> Signup and view all the answers

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