Hello aspirant

You have not mentioned your state, where you belong. I think you are on border line.

chemical engineering, NIT cut off neet 2019 for SC category female was 4714 ( Home state) and 4951 ( other state)

Hence this year whether you be able to get a seat in NIT surathkal or not depends upon jee main cut off of the college 2020. Cut off depends upon various factors such as number of candidates appeared and qualified in exam, difficulty level of exam, previous year's cut off and availability of the seats etc.

For College prediction following links may help you.

https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-surathkal

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer