Which of the following statements is incorrect?
In oxidation, oxygen in added to a substance.
In reduction, hydrogen is added to a substance.
The oxidising agent is oxidised.
The reducing agent is oxidised.
The oxidising agent is reduced. It is not oxidised.
Identify the substance oxidized, substance reduced, oxidising agent and reducing agent. MnO2 + 4HCl → MnCl2 + 2H2O + Cl2.