Dear Ritik, as per 2019 the new eligibility criteria for taking admission in BSc Hons. Chemistry is -

• An aggregate of 60% or more marks in Physics, Chemistry and Mathematics.

Along with this the additional eligibility criteria is also there -

• 50% or more marks in English

You can check the given below link for further details-

https://www.google.com/url?sa=t&source=web&rct=j&url=https://university.careers360.com/articles/du-bsc-eligibility-criteria/amp&ved=2ahUKEwiY26fRsZDjAhWDb30KHQCuCc4QFjALegQIARAB&usg=AOvVaw2IYLaQPVQQnnmO4zozusES&ampcf=1

All the best 

Hope this helps