Hello dear student it's very difficult to get admission in JIPMER with this rank the closing rank of unreserved category in 2018 was 680 so it's not possible for you to get admission in JIPMER. And as far as neet is concerned I would like to ask you for your marks . With your marks I will be able to clear your doubts with That . But till now I will attach a link with you and you check it may help you .

https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cut-off-for-government-colleges/amp

I hope this helps you .