JEE Main

Hello ! It depend on the cut off decided by the JEE that how much marks you are required to get admission in NIT but in case you dont get into NITS dont dishearten yourself,there are some premier private institution where you can get admission based on your JEE marks and can avail High scholarship.
some of these colleges are :
1. NIT
2. SRM
3. Lovely Professional University
i have heard that Lovely Professional University holds a good track of placements.this university has set a record for the highest number of placements from a single campus.
good luck !

check ur rank on shiksha predictor.

if you score 135-140 u may get chemical branch but in round 4 only.

Follow the links sequentially :
https://www.shiksha.com/jee-main-rank-predictor
https://www.shiksha.com/jee-mains-college-predictor

https://www.shiksha.com/jee-main-rank-predictor
use this link

IIIT's take admission as per the JEE result and normalized +2 score . But one needs to apply separately on their admission notifications. Admission is based on all India Rank. state ranks are not considered for admission usually.

There is no point giving a false hope. I would suggest start looking for admission in premier private universities like BITS, MU and Lovely Professional University etc.
Taking a drop would not be a logical step as gap year affects your career a lot.
Dont worry on the placement or Education part. If you would be good you would obviously do well. Best of Luck.