Is the sentence "is there a project on which i can work?"right or
"is there a project in which i can work ?" right
Remember that the pronoun I is capitalized in English, and that sentences begin with a capital letter. Also, there is no space before a punctuation mark.
Is there a project I can work on?
"On which I can work" is technically correct very unnatural in modern conversation.
The "in" is not correct where I live.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.