Hello Gautam,

With this marks and you're from ECE branch the chances for getting IIT or NIT is quite difficult as maximum of the candidate appear in this branch. But as you also said you belong to SC category than you might have chance to get a college. Every year Cutoff of different college vary as the no. Of candidates applying for that College changes.

So, to get a good idea regarding this and to choose which college is feasible for you you can check the below link 

https://engineering.careers360.com/gate-college-predictor

Hope this will help you. Feel free to ask any query.