Hello

I am extremely sorry to tell you dear but without maths being a biology student you cannot pursue btech chemical engineering

This is because,

It is mandatory to have studied maths in 12th for the same.

For example,

Jee main eligibility criteria is given below which is the most widely accepted entrance for engineering-

-) Qualification required :- to be eligible  for JEE mains you need 10+2/equivalent qualification.

For complete and detailed information about jee main eligibility criteria  go through our page, the link for which is provided below

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

Thank you