Chemistry Eligibility

No, B.Sc. Research programme at the Indian Institute of Science (IISc), Bangalore, does not admit applicants who finished their 10+2 coursework in the PCB areas of physics, chemistry, and biology. A strong background in mathematics, a necessary skill for comprehending and evaluating scientific phenomena, is a prerequisite for the B.Sc. Research programme. However, according on their qualifying requirements and areas of interest, students with a background in PCB can apply for other undergraduate programs like the Bachelor of Science (B.Sc. ) programme in Biology, Chemistry, Mathematics, or Physics at IISc.

To get admission in Loyola College for Bsc In Chemistry
Here below is the criteria:
Candidate must have passed 10+2 or equivalent examination with Physics, Mathmatics, Chemistry and any other subjects from a recognized school/board

Yes, you can definitely do an M.Sc. In Food Technology once you have done your bachelor's in biotechnology. Since the minimum eligibility for doing an M.Sc. In Food Technology is a bachelor's degree in any of the following branches: Microbiology, Biotechnology, Biochemistry, Botany, etc.

Yes, you are eligible to appear in NEET as it requires minimum 50% in class 12th for general category and 40% for reserve categories.

Eligibility criteria: Passed 10+2 in Science with 70% marks in aggregate with PCM subjects and Chemistry each.
For more information please visit this link
https://www.shiksha.com/college/ramakrishna-mission-residential-college-narendrapur-kolkata-2154/admission

Sorry dear but you have to score atleast 75% in each. But you can always go for the improvement exam. All the best.

Yes, you are eligible for B.Com course from a Science background.
All the best for your career.