The Hostel is given keeping in mind several factors,for instance,the distance of your hometown,your performance in the entrance tests,the reservation category. If you are getting good rank under Scheduled Caste and Scheduled Tribe Category,so the chances are comparatively higher. However,it also depends on the number of seats available in the hostel. You should talk to the hostel authorities regarding as they can help you better about it as different hostels have different admission policy which may change every year.
Hope this helps.