Noob question
Ye, it has a chance to daze.
“Create a magical storm at the target location that applies random conditions to foes and boons to allies.
…
Daze: 1s"
Source: GW2 Wiki https://wiki.guildwars2.com/wiki/Chaos_Storm
The problem with many of the mesmer’s traits and skills is the amount of RNG applied. It’s one of the reasons I’ve always had a problem with the way a thief’s steal skill works on mesmers: They steal from a mesmer and are guaranteed EVERY BOON in the game for a time once they consume plasma as opposed to gaining X amount of random boons (which would fall more in line with how mesmers gain boons for themselves). That’s ANet logic for you…
Chaos storm do 1 seconf daze like Elodium said and even if there is a lot of RNG involved with that skill so does apply daze quite often. If your opponent is in chaos storm for at least few seconds, he’s most likely get interrupted with daze.