NIT

I am not sure that which branch you'll get but you'll definitely get an NIT.

tuff luck if in general category
focus on advance. 150-160 if in obc

If you have a good JEE Mains score than you can get chance in any of the IIT's. While, to get chance in IIT, JEE Advanced is compulsory.

The answer depends on various aspects such as the NIT you want to go for, branch you are interested in, etc. but rank around 1 to 2 lakh also can get you into some NIT in some branch, ofcourse not a reputed NIT such as NITK, NITT, NITW, etc. Let the rank be generated, till the decide your branch. and then go for admissions. all the best

u have chances .all d best.

Your score is decent and OBC cutoff may be low. CSE doesn't seem to be 'not achievable'. But if not CSE you can always get into IT if you like coding.

For OBC around 145 is a safe score assuming your board score is decent enough. But this varies every year. So don't loose hope. Try for NITK MECH. you may get it. cheers!

157 some how may not be good enough for general category and without state quota. I still think that depends upon the competition and interest of people above you. but even if you don't get in to mechanical NITK, don't loose your hope. There are plenty of other colleges like NIT Allahabad or Rourekela that you can get into and build an outstanding career. Even though NITK looks a tough nut, all the best for your future endeavors.

no chance brother