A mechanism for example is nucleophilic substitution/addition, electrophilic addition. However, as for the name for eg its reduction, oxidation, dehydration
For this instance, the mechanism is electrophilic addition
so the mechanism for ethene reacting with hydrogen bromide is electrophilic addition, but the type of reaction is what?
The name of the reaction is exactly that, in this case electrophillic addition. The mechanism should involve drawing some molecules and some curly arrows to show HOW the reaction happens.