hello  pitla  vinay kumar,

  AS you mention above your  rank in your category from this rank it  is impossible to get any nit chemical  seat . from this rank it is impossible to get any nit also... so you will better try any good government college or any good private college  . for your convince to know which college you got from this rank you use career 360 predictor . 

https://engineering.careers360.com/jee-main-college-predictor?icn=jee-main-clgpd_landing-page&ici=prediction-section_c360-home

 you use above like for this.

 I hope this will help you a lot.

best of luck.