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

3. 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^-

O^2-

O₂⁺

O₂^2-

4. Deadly lead(II) acetate is sometimes called "sugar of lead" because it has a very sweet taste; it was once used to sweeten wine! Lead(II) acetate is written as:

PbC₂O₄

PbC₂H₃O₂

PbCO₃

Pb(C₂O₄)₂

Pb(C₂H₃O₂)₂

5. Iodate ion is used as a disinfectant. The formula of the iodate ion is

IO₃^2-

IO₄^-2

IO₃^-

HIO₃^-

IO₄^-

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

NO₃^-

NO₄^2-

N₂O₃^-2

NO₂^-

HNO₄^-

7. Sodium bicarbonate is "baking soda", the active ingredient in many antacids. The formula of the bicarbonate ion is:

HCO₃^-

HCO₃^2-

(CO₃)₂^4-

CO₃^2-

H₂CO₃^-

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

C₆H₁₂O₆

LiCl

Na₂SO₄

KBr

CO₂

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

HSO₄^-

SO₃^2-

S₂O₃^-2

SO₄^-

SO₄^2-

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

BrO₃^2-

HBrO₃^-

BrO₄^-2

BrO₃^-

BrO₄^-

General Chemistry Online! Quiz