1. When a precipitation reaction occurs, the ions that do not form the precipitate

A. are cations only

B. are left dissolved in the solution

C. evaporate

D. none of these

E. form a second insoluble compound in the solution

2. A substance that, when dissolved in water, produces a solution that conducts electric current very efficiently is called

A. a strong electrolyte

B. none of these

C. a strong ion

D. an electrical solute

E. a weak electrolyte

3. The factors that most commonly cause chemical reactions to occur are all the following except

A. formation of water

B. transfer of electrons

C. formation of a gas

D. formation of a solid

E. a decrease in temperature

4. Solutions of sugars such as glucose react with Ag+(aq) to produce Ag(s). Which of the following happens to silver ion (Ag+) in this reaction.

A. It is both oxidized and reduced

B. It is neither oxidized nor reduced.

C. It is oxidized.

D. It is reduced.

5. An aqueous solution of sodium sulfate is mixed with an aqueous solution of calcium nitrate. Identify the solid formed in the reaction.

A. CaSO4

B. NaNO3

C. Na2SO4

D. There is no solid formed when the two solutions are mixed.

E. Ca(NO3)2

6. Which of the following definitions of oxidation is generally most useful when dealing with ionic materials?

A. gain of hydrogen B. loss of oxygen C. loss of electrons

D. None, these are all equally useful.

7. Examine the reaction taking place in the beaker in the image.

Which of the following is most likely occurring in the beaker?

A. a precipitate forming

B. a metal being reduced

C. a metal being oxidized

D. a salt dissolving

8. Which of the following is true of most bleaches?

A. They are oxidizing agents.

B. They are both reducing agents and oxidizing agents.

C. They are neither reducing agents nor oxidizing agents.

D. They are reducing agents.

9. In the reaction Pb(s) + 2 Ag+(aq) Pb2+(aq) + 2 Ag(s), which species is oxidized?

A. Pb(s)

B. Pb2+(aq)

C. Ag(s)

D. Ag+(aq)

10. A solute whose solution is a good conductor of electricity is classified into which of the following categories?

A. a molecular substance

B. a strong electrolyte

C. an insulator D. a nonelectrolyte

a weak electrolyte