Redox Review

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

• Increased
• Decreased
• Remained Constant
• Varies Randomly

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-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of N in NO₂^-1?

• -3

• +4

• -2

• +3

What is oxidation number of Cr in Cr₂O₇^2-?

• -2

• +2

• +6

• +12

What is oxidation number of Fe in FeO ?

• +2
• -2
• 0
• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the reducing agent of this reaction?
3Mg + N₂−−−−> Mg₃N₂

• Mg
• N₂
• Mg₃N₂
• MgN

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

What is oxidation number of O in H₂O₂ ?

• -2
• -1/2
• +1
• -1

What element is being Oxidized?

• N

• H

• O

• S

What element is being Reduced?

• N

• H

• O

• S