Though, it would e easier for me to guide if you had told me your home state.

But still, owing to your category by God's grace, you can get seat at mediocre NIT at the later rounds.

I would not recommnend you to join GFTI as they are not that well suited for chemical engineering.

The best colleges available

1. NIT Raipur  (chances are bit less)

2. NIT Hamirpur (chances are bit less)