OXIDATION NUMBERS AND REDOX REACTIONS

What is the oxidation state of chromium in the compound CaCr₂O₇?

(a)  

What is the oxidation state of zinc in the compound Zn(OH)₄^2-?

(a)  

What element is being Oxidized?

• N
• H
• O
• S

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

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

• -3
• +4
• -2
• +3

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 oxidation number of P in K₃PO₄?

• +1
• +5
• -2
• 0