What is formed as a result of the reaction CO2 + KMnO4 + HCl =?

Because the reaction is of a redox character, then in the condition there is a small error, because both a reducing agent and an oxidizing agent must be present in a reaction of this type. The condition contains carbon in the maximum oxidation state. This is wrong, because with such a record, carbon simply has nothing to give away. Then the reaction will look like this:

CO + KMnO4 + HCl = CO2 + MnCl2 + KCl + H2O.

C (+2) – 2e = C (+4) – | 5 | reducing agent, oxidized.

Mn (+7) + 5e = Mn (+2) – | 2 | oxidizing agent, recoverable.

5CO + 2KMnO4 + 6HCl = 5CO2 + 2MnCl2 + 2KCl + 3H2O.