Redox Reactions

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Which statement is true:
Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons

• Mg_²⁺ loses 2 electrons

• Mg loses 1 electron

• Mg loses 2 electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Cl₂ + 2e- --> 2Cl ^- is an example of:

• a chemical reaction

• redox

• oxidation

• reduction

Substance that oxidizes another substance by accepting its electrons.

• reducing agent

• oxidation number

• disproportionation

• oxidizing agent

If an atom loses electrons during a chemical reaction, the atom was:

• Oxidized

• Reduced

• Neutralized

• Precipitated

What substance is oxidized in the following reaction?
4Fe + 3O₂ --> 2Fe₂O₃

• Iron

• Fluorine

• Oxygen

Tags

NGSS.MS-PS1-2

Is calcium oxidized or reduced in the following reaction? 
2 CaO--> 2 Ca + O₂

• Oxidized

• Reduced

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following represents oxidation?

• C → CH₄

• Fe³⁺ → Fe²⁺

• Cl₂ → 2Cl^-

• Zn → ZnO

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If in a reaction, copper is reduced; its number of electrons has:

• Increased

• Decreased

• Remained Constant

• Varies Randomly

Tags

NGSS.HS-PS1-2