Can a 11 year old boy get a 11 year girl pregnant with out a condom?

If the boy has reached a stage where he is ejaculating sperm and the girl has reached the stage where she is ovulating that is her periods have started then yes. however at that age it is unlikely.
it depends on if that 11 year old girl has had her period or not, if she has then she can get pregnant but if she hasn't gone through that stage of life then she can't get pregnant.