Question
Science Question on Redox reactions
Which of the following is a redox reaction, but not a combination reaction?
A
C + O₂ → CO₂
B
H₂ + O₂ → H₂O
C
Mg + O₂ → MgO
D
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Answer
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Explanation
Solution
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂ involves both oxidation (CO → CO₂) and reduction (Fe³⁺ → Fe), but it is not a combination reaction since multiple products are formed.