Oxidation & Reduction

Substances that lose electrons easily and are oxidized in a chemical reaction are ____________.

• reducing agents

• coloring agents

• oxidizing agents

• neutralizing agents

• analytical agents

A camera film is covered with silver ions that darkens upon exposure to light. The reaction that

takes place is: Ag ⁺ + e^‾ → Ag. In this reaction, silver ion acts as ____________

• reducing agent.

• dissolving agent.

• analytical agent.

• oxidizing agent

During the process of reduction, _________________

• protons are lost.

• protons are gained.

• electrons are lost.

• electrons are gained

• neutrons are lost.

The change of I^‾ to I₂ is ________________

• oxidation

• reduction

• neutralization

• Decomposition

• Combustion

What is the oxidation number of Nitrogen in HNO₃

• -7

• -5

• +5

• +7

• +2

Identify the species reduced in the following reaction.

Fe_(s) + 2 Ag⁺_(aq) → Fe²⁺_(aq) + 2 Ag_(s)

• Fe

• Ag

• none of these

• None of the above

The below reaction is an example of _________reaction.

F₂ → 2 F^- + 2 e^-

• Oxidation

• Reduction

• Neutralization

• decomposition

• combustion

Find the oxidation number of Ca in CaH₂

• -2

• -4

• +2

• +4

• 0

Which of the following statements refers to an oxidation process?

• Hydrogen is added to ethene

• Oxygen is removed from carbon dioxide

• Chlorine accepts electrons

• Increase in the oxidation number of magnesium metal

What are the oxidation numbers of manganese in the manganese compounds shown below?

• A

• B

• C

• D