Question 1

Which of the following best describes what occurs during oxidation in a redox reaction?

Accepted Answer

An atom or ion loses electrons

Question 2

In the reaction $$2Fe^{2+} + C$$ \rightarrow 2Fe + $$CO_2$$, which element is oxidized?

Accepted Answer

Carbon

Question 3

Which of the following is NOT a characteristic of reduction?

Accepted Answer

Gain of oxygen

Question 4

Assign the oxidation number to sulfur in $$SO_2.$$

Accepted Answer

$$+4$$

Question 5

Which of the following processes is an example of reduction?

Accepted Answer

Gain of hydrogen

Question 6

In the reaction $$Zn(s) + Cu$$^{2+}$$(aq) \rightarrow Zn$$^{2+}$$(aq) + Cu(s)$$, which species is the oxidizing agent?

Accepted Answer

$$Cu^{2+}$$

Question 7

Which of the following statements about oxidation numbers is correct?

Accepted Answer

The oxidation number of an element in its elemental form is $$0$$

Question 8

A coil of copper wire is placed into a silver nitrate solution. Silver metal deposits on the wire and the solution turns blue as $$Cu^{2+}$$ ions increase. During this process, $$Ag^+ is$$:

Accepted Answer

The element reduced

Question 9

Which of the following is the correct balanced half-reaction for the oxidation of magnesium in acid?

Accepted Answer

$$Mg \rightarrow Mg$$^{2+}$$ + 2e^-$$

Question 10

Which of the following is a common real-world application of a redox reaction?

Accepted Answer

Bleaching hair with hydrogen peroxide

Question 11

In the process of photosynthesis, which element is being oxidized?

Accepted Answer

Carbon

Question 12

Which of the following is true about the anode in an electrochemical cell?

Accepted Answer

It is where oxidation occurs

Question 13

Which of the following is the correct oxidation number for nitrogen in $$NO_3$$^-$$?

Accepted Answer

$$+5$$

Question 14

Which of the following is a reducing agent in the reaction $$2Fe_2O_3(s) + 3C(s) \rightarrow 4Fe(s) + 3CO_2(g)$$?

Accepted Answer

$$C$$

Question 15

Which of the following is NOT a common oxidizing agent?

Accepted Answer

Coke (carbon)

Question 16

In the reaction $$2H_2 + O_2$ \rightarrow 2H_2O$$, what is the oxidation number of hydrogen in $$H_2O$$?

Accepted Answer

$$+1$$

Question 17

Which of the following best describes the role of aluminum in the restoration of tarnished silver using sodium bicarbonate?

Accepted Answer

Aluminum acts as a reducing agent

Question 18

Which of the following statements about the sum of oxidation numbers in a polyatomic ion is correct?

Accepted Answer

It equals the charge on the ion

Question 19

Which of the following is the correct overall balanced reaction for the combination of magnesium and oxygen?

Accepted Answer

$$2Mg + O_2$ \rightarrow 2MgO$$

Question 20

Which of the following is a real-life example of a redox reaction critical to living organisms?

Accepted Answer

Photosynthesis in plants

Oxidation and Reduction (Redox) Reactions: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards