Well Rahul first of all well done you have scored a good rank in NIMCET 2019. You got a rank of 784 in general category. Now considering your rank and previous year closing rank, it appears that it might or might not be possible for you to get a seat in nit. 

As previous year closing rank went upto maximum around 700 so it might be possible that you get on lower nit. But the chances are very bleak .

All the best.

Thank you.