Final answer:
In the reaction Fe2O₃ + 3H₂ → 2Fe + 3H₂O, H₂ is the reducing agent.
Step-by-step explanation:
In the reaction Fe2O₃ + 3H₂ → 2Fe + 3H₂O, H₂ is the reducing agent.
A reducing agent is a substance that donates electrons and gets oxidized in a reaction. In this reaction, hydrogen gas (H₂) is being oxidized to form water (H₂O). Since it is losing electrons, it is the reducing agent.
On the other hand, Fe₂O₃ is being reduced to form iron (Fe). It gains electrons and is therefore the oxidizing agent.