Is there any Job available for 12th passed student in CBI, IB, RAW???

Yes, there is Job available for 12th passed student in CID, The examination is conducted by the UPSC only once a year and conducted for following post

CID constable
Sub Inspector
Officer level post

Eligibility conditions:

CID constable
You should have pass 10+2 in any streams from any recognized board of India.

Sub Inspector
You must have completed your graduation in any streams.

Officer level post
You must have completed your Graduation and students who have completed their graduation in criminology are preferred.

So you are eligible for the CID constable post………………..