Worksheet: Compounds and Mixtures

In this worksheet, we will practice defining and identifying compounds and mixtures and using these terms in the context of materials and physical processes.

Q1:

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

  • ASolutions cannot be pure substances.
  • BA pure substance consists of only one type of molecule or unit.
  • CAll pure substances contain only one type of atom.
  • DExamples of pure substances include distilled water, nitrogen gas, and sodium chloride.
  • EPure substances are homogeneous.

Q2:

Which of the following is true for a homogeneous mixture?

  • AA homogeneous mixture is one where nothing is reacting.
  • BThe components of a homogeneous mixture are unevenly distributed.
  • CThe components of a homogeneous mixture are all evenly distributed.
  • DA homogeneous mixture can never be unmixed.
  • EAll the components of a homogeneous mixture are in the same phase.

Q3:

Which of the following is not a compound?

  • AMagnesium oxide
  • BCarbon dioxide
  • CHydrogen chloride
  • DOxygen
  • EWater

Q4:

Which of the following is true for mixtures?

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

Q5:

Which one of the following is true for compounds?

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

Q6:

Which of the following is true for a heterogeneous mixture?

  • AA heterogeneous mixture is one in which two or more components are reacting together.
  • BThe components of a heterogeneous mixture are evenly distributed.
  • CThe components of a heterogeneous mixture are unevenly distributed.
  • DA heterogeneous mixture is one that can be unmixed.
  • EThe components of a heterogeneous mixture exist in a range of phases.

Q7:

Which of the following best describes a compound?

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

Q8:

Fill in the blank: Calcium and chlorine combine to form calcium chloride, which is .

  • Aa mixture
  • Ba metal
  • Ca compound
  • Da solvent
  • Ean element

Q9:

Which of the following words describes the role of sodium chloride when it is dissolved in water?

  • ASolution
  • BDissolution
  • CSolute
  • DSolvent
  • EMixture

Q10:

Which of the following words describes the role of water when sodium chloride is dissolved in it?

  • AMixture
  • BSolution
  • CSolvent
  • DSolute
  • EDissolution

Q11:

Which of the following words describes the resulting liquid when sodium chloride is dissolved in water?

  • ACompound
  • BSolvent
  • CSolute
  • DSolution
  • EDissolution

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.