Oxidation-Reduction

Question 1

Which identifies an oxidation-reduction reaction?

Revolt · Accepted Answer

a reaction in which oxidation numbers change

Question 2

What is the oxidation number for S in the compound SO3? (Recall that O has an oxidation number of –2.)

Revolt · Accepted Answer

+6

Question 3

Which of the following is a simple definition of oxidation?

Revolt · Accepted Answer

the loss of electrons

Question 4

Which best describes the oxidizing agent in this reaction? Cl2(aq) + 2Br–(aq) 2Cl–(aq) + Br2(aq)

Revolt · Accepted Answer

Chlorine (Cl) is the oxidizing agent because it gains an electron.

Question 5

Given the reaction below, which is being reduced?Mg + Cl2 Mg2+ + 2Cl–

Revolt · Accepted Answer

CI2

Question 6

Which type of reaction occurs in the following?2HgO(s) 2Hg(l) + O2(g)

Revolt · Accepted Answer

a decomposition reaction in which a metal is reduced

Question 7

Which describes the oxidizing agent in a chemical reaction?

Revolt · Accepted Answer

the substance that is reduced because it gains electrons

Question 8

Consider the following reaction.CO2(g) + H2(g) CO(g) + H2O(l) What is being oxidized?

Revolt · Accepted Answer

hydrogen

Question 9

Which of the following is an oxidation-reduction reaction?

Revolt · Accepted Answer

ZnS(s) + 2O2(g) ZnSO4(s)

Question 10

Which answer best describes what is happening in the following reaction?2C8H18 + 25O2 16CO2 + 18H2O

Revolt · Accepted Answer

This is a redox reaction in which octane (C8H18) is the reducing agent.

Oxidation-Reduction Answers