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Industrial Chemistry 1a – Test 3


1. Hard water can be caused by the presence of:

    A. nitrate ions
    B. sodium ions
    C. magnesium ions
    D. potassium ions


2. Galvanized iron does not rust because it is protected by a layer of:

    A. zinc
    B. tin
    C. copper
    D. aluminum


3. Steel-making consumes over 70% of the annual production of:

    A. sulfuric acid
    B. ammonia
    C. oxygen
    D. chlorine


4. The fractional distillation of liquid air is used commercially to obtain:

    A. dry ice
    B. ammonia
    C. oxygen
    D. carbon dioxide


5. Street lights contain vaporous:

    A. sodium
    B. potassium
    C. lithium
    D. magnesium


6. If an electric spark were passed through a tube filled only with hydrogen:

    A. the hydrogen would explode
    B. the hydrogen would condense
    C. water vapor would form
    D. no reaction would occur


7. Helium is used:

    A. in the plastic industry
    B. for deep-sea diving
    C. for making gasoline
    D. as a solvent


8. A hydrocarbon solvent fire is best extinguished with:

    A. carbon dioxide
    B. water
    C. compressed air
    D. sand


9. Hydrogen is:

    A. heavier than air and colorless
    B. lighter than air and inert
    C. odorless and slightly soluble in water
    D. very soluble in water and combustible


10. Which of the following is a major pollutant of electric power generation?

    A. carbon monoxide
    B. sulfur dioxide
    C. ozone
    D. peroxyacyl nitrates












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