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Which of the following reactions is a reduction? (2020)

Practice Questions

Q1
Which of the following reactions is a reduction? (2020)
  1. Fe2O3 + 3CO → 2Fe + 3CO2
  2. 2H2 + O2 → 2H2O
  3. 2Na + Cl2 → 2NaCl
  4. C + O2 → CO2

Questions & Step-by-Step Solutions

Which of the following reactions is a reduction? (2020)
  • Step 1: Identify the reactants in the reaction: Fe2O3 and CO.
  • Step 2: Understand what reduction means: Reduction is when a substance gains electrons.
  • Step 3: Look at the products of the reaction: 2Fe and 3CO2.
  • Step 4: Determine what happens to iron (Fe) in the reaction: It goes from Fe2O3 to elemental Fe.
  • Step 5: Recognize that iron (Fe) is gaining electrons during this process.
  • Step 6: Identify that carbon monoxide (CO) is losing electrons to iron (Fe).
  • Step 7: Conclude that since iron (Fe) gains electrons, it is being reduced.
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