Hello aspirant

Hope you are doing great there . According to the tentative cut off recieved yet , this year a SC candidate scoring percentile score around 50-55 , will get a chance to appear for jee advance , however the cut off percentile score might change . So as of now , you will be eligible for jee advance . And your overall percentile will be taken into account that means your percentile score in chemistry will not affect your qualification .

hope my answer helps

Wish you all the very best!