Chemical Classification

10 Questions | Total Attempts: 1097

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Chemical Classification

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Questions and Answers
  • 1. 
    Which of the following are examples of matter?  Check all that apply. 
    • A. 

      Sound

    • B. 

      Water

    • C. 

      Air

    • D. 

      Heat

    • E. 

      Energy

  • 2. 
    Which of these substances are elements?  Check all that apply. 
    • A. 

      Iodine

    • B. 

      Quartz

    • C. 

      Water

    • D. 

      Silicone

    • E. 

      Lead

    • F. 

      Silicon

  • 3. 
    Which of the following are mixtures?  Check all that apply.
    • A. 

      Salt water

    • B. 

      Water (H2O)

    • C. 

      Salt (NaCl)

    • D. 

      Air (mostly N2 and O2)

  • 4. 
    Identify the pure substances in the following list.  If there is more than one answer, select all that apply. 
    • A. 

      Whole blood

    • B. 

      Table salt (NaCl)

    • C. 

      Gold (Au)

    • D. 

      Alcoholic drink

    • E. 

      Air (mostly N2 and O2)

    • F. 

      Saline solution

    • G. 

      Ethanol (CH3CH2OH)

    • H. 

      Elemental oxygen

  • 5. 
    Select the statements that pertain to elements.  Select all the statements that apply. 
    • A. 

      These cannot be broken down by chemical means

    • B. 

      These can be broken down by physical means

    • C. 

      These are pure substances

    • D. 

      These combine chemically to form new substances; they are building blocks of matter

    • E. 

      These are chemical combinations of simpler forms of matter

  • 6. 
    Compounds must contain at least two elements.
    • A. 

      True

    • B. 

      False

  • 7. 
    Elements cannot be broken down further by processes such as boiling. 
    • A. 

      True

    • B. 

      False

  • 8. 
    Compounds may be broken down into simpler substances through chemical processes. 
    • A. 

      True

    • B. 

      False

  • 9. 
    Elements are pure substances whereas compounds are mixtures. 
    • A. 

      True

    • B. 

      False

  • 10. 
    A compound is a physical mixture of simpler substances. 
    • A. 

      True

    • B. 

      False