Determine if the following reactions are Redox reactions or not, and if they are, indicate what...

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Question

Determine if the following reactions are Redox reactions or not, and if they are, indicate what are the reducing agent and the oxidizing agent for each
1. Ca + 2H₂O  Ca(OH)₂ + H₂
1. C₂H₂ + 2Br₂  C₂H₂Br₄
1. H₂SO₄ + Ba(OH)₂  2H₂O + BaSO₄
1. Fe₂O₃ + 3CO  2Fe + 3CO₂

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