Cut-off in Delhi University goes pretty high,and it's not just in case of science subject but arts as well last year cut off for Political Science was 99% for Hindu College. Even, in science for north campus colleges,it remains pretty high at above 95%, so for candidates belonging to General Category should score above 95% for BSc Science especially in top North Campus colleges.
Check out previous year cut-offs for Delhi University; https://www.google.com/amp/s/university.careers360.com/articles/du-cutoff/amp