As, Jee mains is an entrance exam for seat allotment of engineering courses.where, as studied Bsc. Chemistry is not allowed.

It is not possible of getting the seat in jee mains even you are darged.

Dear aspirant,

If you studied bsc chemistry then I am not able to understand why do you want to give jee exam and considering you want to  write your jee mains to get into an engineering college and get your BTech degree. You can give jee mains exams but you will be repeating your graduation.