General Chemistry Online: Companion Notes: Compounds: Polyatomic ions: Quiz

3. A sudden surge in the concentration of thiosulfate ions in geyser water may be a sign that a volcanic eruption is imminent. The thiosulfate ion is:

S₂O₄^2-

SO₄^2-

S₂O₄^-

S₂O₃^2-

SO₃^2-

4. The SCN^- ion forms a bright red complex with iron(II) ions. The SCN^- ion is called the:

thiocyanide ion

thiocyanate ion

cyanate ion

cyanide ion

thiocyanite ion

sulfurocyanide ion

5. Perbromate ion is extremely unstable for quantum mechanical reasons. If it existed, the formula of the perbromate ion could be:

HBrO₃^-

BrO₃^2-

BrO₄^-

BrO₄^-2

BrO₃^-

6. Stable compounds containing the iodite ion have never been prepared. The formula of the iodite ion could be:

IO₂^-2

IO₂^-

HIO₃^-

IO₃^-

IO^2-

7. Chlorite compounds are extremely explosive when they come into contact with combustible material. The formula of the chlorite ion is:

ClO₂^-

ClO₂^-2

ClO₃^-

ClO^2-

HClO₃^-

8. Sodium acetate is used in chemical handwarmers and heating pads because it gives up a large amount of heat when it changes from a liquid to a solid. The formula for this compound is:

NaAc₂

Na₂C₂H₃O₂

NaC₂H₃O₂

Na₂C₂O₄

NaC₂H₄O

9. Which of the following compounds contains a polyatomic ion?

C₆H₁₂O₆

LiCl

CO₂

KBr

Na₂SO₄

10. Perchlorate compounds are used in explosives and jet fuels. The formula of the perchlorate ion is

ClO₃^-

ClO₄^-2

ClO₃^2-

ClO₄^-

HClO₃^-

General Chemistry Online! Quiz