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

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Compounds

Polyatomic ions

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1. Sodium peroxide can be used for oxygen generation in diving bells and submarines, since it reacts with carbon dioxide and produces oxygen gas. The peroxide ion has the formula:

O₂^-

O₃^-

O₂⁺

O^2-

O₂^2-

2. Sodium aluminate is used in fabric printing processes. If the formula is NaAlO₂, the charge on the aluminate ion must be:

-1

-2

3. Nitrite ion is used in bleaching, dyeing and printing fabrics. The formula of the nitrite ion is:

NO₄^2-

HNO₄^-

N₂O₃^-2

NO₂^-

NO₃^-

4. 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:

NaC₂H₃O₂

NaAc₂

Na₂C₂H₃O₂

NaC₂H₄O

Na₂C₂O₄

5. Chlorine dioxide is used as an oxidizing agent in many industrial processes. Because it is explosive, it is never shipped, but prepared as needed by a reaction involving the more stable chlorate ion. The formula of the chlorate ion is:

ClO₄^-2

ClO₂^-

ClO₄^-

ClO₃^2-

ClO₃^-

6. The NO₄^- ion exists in small quantities in the upper atmosphere. Using the naming guidelines for polyatomic ions, the name of this ion would be:

nitrate

hyponitrite

nitrite

pernitrate

supernitrate

7. Sodium sulfate occurs in nature as the minerals mirabilite and thenardite. The formula of the sulfate ion is:

SO₃^2-

SO₄^-

S₂O₃^-2

HSO₄^-

SO₄^2-

8. Which of the following is the bisulfate ion?

S₂O₃^2-

(SO₄^2-)₂

SO₄^2-

HSO₄^-

S₂O₈^2-

9. Veterinarians administer an 0.2 percent potassium permanganate solution to cows and horses as an antidote for plant alkaloid poisoning. A bottle that contains potassium permanganate solution might be labelled:

KMnO₃

K₂MnO₃

KMnO₄

K₂MnO₄

KMgO₄

10. If TeO₄^2- is the tellurate ion, the name of the TeO₃^2- ion is expected to be:

hemitellurate

hypotellurite

telluride

tellurite

pertellurate

General Chemistry Online! Quiz