Chemistry: Quiz: Introduction to Oxidation-Reduction Reactions

Quiz: Introduction to Oxidation-Reduction Reactions

1. Spontaneous redox reactions are known as __________ reactions in both industry and the human body.

a. energy consuming

b. energy producing

c. energy constant

2. Oxidation and reduction occur

a. simultaneously

b. in separate reactions

c. on the product side of the reaction

3. The key characteristic of redox reactions is the

a. fixed electron configurations of each species

b. noble gas electron configurations of each species

c. passing of one or more electrons from one species to another

4. __________ are assigned to each element as a formalism to keep track of the movement of electrons between species.

a. Physical phases

b. Oxidation numbers

c. Molar masses

5. Simply stated, the gain of electrons is

a. reduction

b. oxidation

c. sublimation

6. During oxidation, the oxidation number of a species becomes

a. more negative

b. more positive

c. more neutral

7. The species that is being reduced will have

a. a more negative oxidation state after the reduction has occurred.

b. a more positive oxidation state after the reduction has occurred.

c. no change in its oxidation state after the reduction has occurred.

8. The goal of a redox reaction is to keep the number of electrons lost

a. less than the number of electrons gained

b. equal to the number of electrons gained

c. more than the number of electrons gained

9. Changes in the __________ can also be used to balance redox equations.

a. physical states

b. number of species

c. oxidation numbers