REDOX reactions
 
1

Assign Oxidation numbers then use them to find out what has been oxidised and what has been reduced:

2

 For each of 1a - e, identify the oxidising agent and reducing agent:

  3      Define the following terms:
  a CuO + H2 à Cu + H2O     Ox Agent Red Agent a Oxidation  
                    a          
  b 2I- + Br2 à I2 + 2Br-         b Reduction  
                    b          
  c Mg + 2Ag+ à Mg2+ + 2Ag         c Oxidising agent  
                    c          
  d 2Fe2+ + Cl2 à 2Fe3+ + 2Cl-         d Reducing agent  
                    d          
  e Br2 + H2S à 2HBr + S              
                    e