HELLO RISHAB

lets compare both general and sc
First JEE mains qualifying
Safe percentile for qualifying jee mains for general category is about 85 and for sc is around 70

Secondly TOP NITS
To get into top 5 NITs a general candidate should have a percentile above 99 and for sc it comes around to be greater than 95 just to be on a safer side it might be less or more.
if you want to look into the cutoffs for top 5 nits then you ca click this link below
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

HOPE IT HELPS