Redox Reactions

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

• -3
• +4
• -2
• +3

Tags

NGSS.HS-PS1-1

The sum of all oxidation numbers in a neutral compound is ___.

• 0
• 1
• -1
• depends on the compound

What is oxidation number of Mn in MnO₂ ?

• 0
• +2
• -2
• +4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of S in SO₄ ^2-  ?

• -2
• +2
• +6
• -4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• -2
• +2
• +6
• +12

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of O in CO₂?

• +2
• -1
• +4
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What element is being Oxidized?

• N
• H
• O
• S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What element is being Reduced?

• N
• H
• O
• S

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

     In the reaction Zn + H₂O --> ZnO₂ + H₂
 which element, if any, is oxidized? 

• Zinc
• Hydrogen
• Oxygen
• None

Tags

NGSS.HS-PS1-2