India

Most top B-schools would prefer graduation through full time course with minimum 50% marks in graduation. Although some tier 3 colleges would allow distance graduation course.

You may refer to the following link for a list of the best colleges to pursue chemical engineering in Gujarat: https://www.shiksha.com/top-chemical-engineering-colleges-in-gujarat-rankingpage-52-0-109-0-0

If you are looking for B.Com degree then it would be better that you complete your B.Com in India, then you can go abroad for higher studies. It is better not to go abroad at too early age.

CMAT score is accepted at many management colleges including Adani Institute of Infrastructure Management (AIIM) - Ahmedabad, Amrut Mody School of Management-Ahmedabad University, BK School of Business Management, Gujarat University, Maharaja Sayajirao University of Baroda, Vadodara etc. Depending upon your choice of stream in MBA and city, you can find out which colleges take CMAT score and its cut-off as well from their respective college websites.

Hi,
Kindly, read this:
https://drive.google.com/file/d/0B9fSB3Trgba-MWtIbUtjYVZpaUE/view
https://www.shiksha.com/mba/course/mba-executive-faculty-management-studies-fms/111549