Do critical hits disregard resistances from held items?

Question

I have a fire type with an iron ball (for a trick room team) and the opponent used earthquake while burned, and he still did a crap ton of damage. he got a critical hit so my question is: do critical hits ignore the ground defense of the iron ball? do they ignore the decreased power of being burned?
Thanks!

Answer 1

No they don't bypass burn. I've had enough experience in competitive battling to know.