Oxidation Numbers

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

What is the oxidation number of O in CO₂?

• +2
• -1
• +4
• -2

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

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

What is the oxidation of C in CH₄?

• -4
• -1
• +4
• +1

What is oxidation number of Mn in MnO₂ ?

• 0
• +2
• -2
• +4

What is the oxidation number of Ca in Ca₃N₂?

• +3
• +2
• -3
• -2

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

• -2
• +2
• +6
• +12

What is the oxidation state of H in H₂?

• +2

• +1

• 0

• None of the above

H in NaH ?

• +1

• 0

• -1

• None of the above

Oxidation number of O in its stable elemental form, O₂:

• 0

• -1

• -2

• +2