Unit 15 Redox Chemistry

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Tags

NGSS.HS-PS1-2

What is the oxidation number of H in CH₄?

• -1
• +1
• -4
• +4

Tags

NGSS.HS-PS1-1

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

• Reduced
• Synthesized
• Oxidized
• None of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• Reduced
• Synthesized
• Oxidized
• None of the above

What is the oxidation number of O in elemental O₂ ?

• 0

• -2

• +1

• +2

Tags

NGSS.HS-PS1-1

What element always has an oxidation number of -1?

• Hydrogen
• Fluorine
• Chlorine
• Iodine

How would you write the electrons in the reaction O_{2 -->} O₂^-2 ?

• add 2e^- to the products

• add 2e^- to the reactants

• add e^- to the products

• add e^- to the reactants

Tags

NGSS.HS-PS1-2

Which process involves the transfer of electrons?

• double replacement

• neutralization

• oxidation-reduction

• sublimation

Tags

NGSS.HS-PS1-2

During which process does an atom gain one or more electrons?

• transmutation

• reduction

• oxidation

• neutralization

Tags

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