a) Identify the substance oxidised, substance reduced, oxidising agent and reducing agent in the following reaction: 

b) In the reaction , what is oxidised and what is reduced? 

(a) In this reaction, We need to find oxidation numbers in each compound

 

          

In MnO_2,Oxidation number of Mn will be  x-4=0

                                                            x=+4

In MnCl₂,Oxidation number of Mn will be  x-2=0

                                                             x=+2

So from conversion to MnO₂ to MnCl_2, Oxidation number is reduced which means  MnO₂ is reduced to MnCl₂ and  this process is reduction.

MnO₂  is reduced so it will oxidise other compounds.

So MnO₂ =Oxidising agent 

When HCl is converted to Cl_2, it looses hydrogen so when hydrogen is released it means this is Oxidation process and HCl is oxidised which means it will reduce other compounds

So HCl=Reducing agent

 

 

(b)

 

 

Zn is oxidised in ZnSO4 and CuSO₄  is reduced in Cu.