I'm in +2 in hostel I would like to study IIT entrance but I can't go outing so please suggest me some website to study basis

Navanit, since you cannot go out to join a coaching institute for studyinf for IIT entrance examination, I suggest that you procure the study material form a reputed coaching centre (like the ones you have in Kota rajasthan) and then prepare with the help of it. You can also appear for mocj=k tests