B.Sc

Yes, your board percentage are very good, you can surely get admission in St Xaviers college.

10+2 with Physics, Chemistry, Botany and Zoology with 50% for B.Sc. Microbiology. With 69% you are eligible to apply in most colleges.
Check your choice of college website for eligibility criteria.
It is hard to get admission in DU.

Yes, there are chances to get admission in Delhi University so you can apply for admission. Good luck.

Your percentage is enough to get this college for this course.

Please check the link predictor for good college
https://www.shiksha.com/animation/2d-3d-animation/articles/top-10-animation-colleges-in-india-blogId-10898
Good luck.

Yes, Absolutely, A Graduate in any science stream (Chemistry, zoology etc.) can apply for M.Sc in Food Technology.
M.Sc in Food Technology is a 2-year postgraduate course. Food Technology is the branch of food science involving the processing, protection, preparation, selection, distribution, and utilization of sheltered, nutritious, and healthy nourishment.

Please visit www.mietedu.ac.in
Good Placement
Qualified Faculties
Good Infrasture

Candidates must have completed his/her Intermediate or equivalent with Physics, Chemistry, Maths & English.
Those who have done 3 years Diploma Course after Matriculation or Intermediate with Commerce or Arts are also eligible.
Good Luck.