Hey there as per you obc category ranking in jee mains there is a chances of you to get branches in the following nits 

Nits srinagar closing rank for chemical is20050 and you can check cutoff for all other branches of nit srinagar 20050

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-nit-srinagar/amp

But it is very difficult to get a core branches in top nits like nit trichuplli ,nit bhopal,nit allahabad .