Chemistry

No, you are not eligible.

Follow these steps to improve your chemistry:
1. First decided which chapter you want to study and from where you want to study. 2. Read the study material once before going into the class.
3. Listen to your teachers in the class very carefully.
4. If you have doubts or questions feel free to ask teachers.
5. Take plenty of notes and review your notes once after coming back home. Hope it helps
All the Best.

Yes, CCS University provides B.Sc in chemistry.
You can refer the following link about the detailed information about admission at CCS University.
https://www.shiksha.com/university/ccs-chaudhary-charan-singh-university-meerut-19694

Yes, you can do BCA without Maths.
There are very few colleges that offer BCA without Maths
Some of them are: Christ University, Bangalore, BIT Mesra , LPU, etc.

Yes, you have chances of getting sea in your desired branch. So, attend the counselling and choose your options. All the best.

If you want admission through AUCET, then you may not able to get free seat. The fee is same for all rank candidates. For more details download the brochure from the website and read it. All the best.