Redox

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

• Iron
• Fluorine
• Oxygen

Tags

NGSS.HS-PS1-2

In the reaction
2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

• Reduced
• Synthesized
• Oxidized
• None of the above

Tags

NGSS.HS-PS1-2

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

• Oxidized
• Reduced
• Neutralized
• Precipitated

Tags

NGSS.HS-PS1-2

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

• Increased

• Decreased

• Remained Constant

• Varies Randomly

Tags

NGSS.HS-PS1-2

In a redox reaction, the species reduced

• gains electrons and is the oxidizing agent

• loses electrons and is the oxidizing agent

• loses electrons and is the reducing agent

• gains electrons and is the reducing agent

Tags

NGSS.HS-PS1-2

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Another name for a "oxidation-reduction" reaction is

• chemical reaction
• neutralization reaction
• redox reaction
• nuclear reaction

Identify the substance that is reduced in the reaction between hydrogen and iron(II) oxide.

H₂ + FeO → H₂O + Fe

• H₂

• FeO

• H₂O

• Fe

Tags

NGSS.HS-PS1-2

Identify the substance that is oxidised in the reaction between carbon and zinc oxide.

C + 2ZnO → CO₂ + 2Zn

• C

• ZnO

• CO₂

• Zn

Tags

NGSS.HS-PS1-2