Oxidation-Reduction

Question 1

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 2

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 3

Which identifies an oxidation-reduction reaction?

Revolt · Accepted Answer

a reaction in which oxidation numbers change

Question 4

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.

Question 5

In the redox reaction below, which is the reducing agent?MnO2(s) + 4H+(aq) + 2Cl–(aq) Mn2+(aq) + 2H2O(l) + Cl2(g)

Revolt · Accepted Answer

CI–

Question 6

The presence of which reactant is the best indicator of an oxidation-reduction reaction?

Revolt · Accepted Answer

H2

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

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 9

Which of the following is a simple definition of oxidation?

Revolt · Accepted Answer

the loss of electrons

Question 10

Which of the following is true about a redox reaction?

Revolt · Accepted Answer

In a redox reaction, the reducing agent loses electrons.

Oxidation-Reduction Answers