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Lesson: Compounds and Mixtures

Worksheet • 7 Questions

Q1:

What of the following is true for a homogeneous mixture?

  • AThe components of a homogeneous mixture are all evenly distributed.
  • BThe components of a homogeneous mixture are unevenly distributed.
  • CAll the components of a homogeneous mixture are in the same phase.
  • DA homogeneous mixture can never be un-mixed.
  • EA homogeneous mixture is one where nothing is reacting.

Q2:

Which one of the following is true for compounds?

  • ACompounds are composed of two or more types of atom bonded together in a fixed ratio.
  • BCompounds are formed when two atoms of the same element join together.
  • CCompounds are made of only one type of atom.
  • DCompounds cannot be separated into their component elements.
  • EA compound is formed when different molecules share the same container.

Q3:

Which of the following is not true for a pure substance?

  • AAll pure substances contain only one type of atom.
  • BExamples of pure substances include distilled water, nitrogen gas and sodium chloride.
  • CSolutions cannot be pure substances.
  • DPure substances are homogeneous.
  • EA pure substance consists of only one type of molecule or unit.

Q4:

Which of the following is not a compound?

  • AOxygen
  • BWater
  • CMagnesium oxide
  • DHydrochloric acid
  • ECarbon dioxide

Q5:

Which one of the following is true for mixtures?

  • AMixtures consist of particles of different substances mixed—but not reacted—together.
  • BMixtures cannot be separated into their components.
  • CMixtures can only be made by mixing pure substances together.
  • DPure elements cannot form mixtures.
  • EA mixture is always formed when two substances react together.

Q6:

Which of the following best describes a compound?

  • AA substance composed of two or more elements, chemically bonded together in a fixed ratio
  • BAtoms chemically bonded together in a discrete unit
  • CA mixture of different elements
  • DA single atom of an element

Q7:

Which one of the following is true for a heterogeneous mixture?

  • AThe components of a heterogeneous mixture are unevenly distributed.
  • BThe components of a heterogeneous mixture are evenly distributed.
  • CThe components of a heterogeneous mixture exist in a range of phases.
  • DA heterogeneous mixture is one which can be un-mixed.
  • EA heterogeneous mixture is one in which two or more components are reacting together.
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