Which of the following reactions is an example of a redox reaction? (2023)

Practice Questions

Q1
Which of the following reactions is an example of a redox reaction? (2023)
  1. H2 + Cl2 → 2HCl
  2. NaOH + HCl → NaCl + H2O
  3. CaCO3 → CaO + CO2
  4. C + O2 → CO2

Questions & Step-by-Step Solutions

Which of the following reactions is an example of a redox reaction? (2023)
  • Step 1: Understand what a redox reaction is. A redox reaction involves the transfer of electrons between two substances.
  • Step 2: Identify the two processes in a redox reaction: oxidation (loss of electrons) and reduction (gain of electrons).
  • Step 3: Look at the reaction C + O2 → CO2.
  • Step 4: Determine what happens to carbon (C) in the reaction. Carbon combines with oxygen, indicating it loses electrons, which means it is oxidized.
  • Step 5: Determine what happens to oxygen (O2) in the reaction. Oxygen combines with carbon, indicating it gains electrons, which means it is reduced.
  • Step 6: Conclude that since carbon is oxidized and oxygen is reduced, the reaction C + O2 → CO2 is indeed a redox reaction.
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