Ferric Oxide Is Used as a Pigment in Metal Polishing

question 33

Multiple Choice

Ferric oxide is used as a pigment in metal polishing. Which of the following is its formula?

• A)FeO
• B)Fe ₂O
• C)FeO ₃
• D)Fe ₂O ₅
• E)Fe ₂O ₃

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