Oxidation and Reduction

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

• reducing agents

• coloring agents

• oxidizing agents

• neutralizing agents

• analytical agents

During the process of reduction, _________________

• protons are lost.

• protons are gained.

• electrons are lost.

• electrons are gained

• neutrons are lost.

Tags

NGSS.HS-PS1-1

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

Tags

NGSS.HS-PS1-2

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

Oxidation is....

• Gain of electrons

• Loss of electrons

• Both the loss and gain of electrons

• None of these

Reduction is....

• Gain of electrons

• Loss of electrons

• Both the loss and gain of electrons

• None of these

What is the oxidation state of Nitrogen in N₂ (g)?

• 4

• 6

• 2

• 0

Oxidation involves

• gaining electrons; gaining oxygen

• losing electrons; losing oxygen

• gaining electrons; losing oxygen

• losing electrons; gaining oxygen