Éclater belong to the 1st
group. Éclater is a common french verb.
Éclater is conjugated the same way that verbs that end in : -er
Éclater is conjugated with the two auxiliaries être
Éclater verb is
direct transitive, intransitive.
French verb éclater can be conjugated in the reflexive form: S'éclater
verb is a direct transitive verb, so passive voice can be used.
Attention: passive voice can only be used when éclater verb is conjugated with auxiliary avoir.