Science

Actually the fact is that no course is hard if you do it seriously with hardwork and attention. Many Science students purse BBA. If you are interested in management studies then yes it will be a good choice for you.

Actually you can't do like this. If you have Masters in maths then cannot go for Ph.D. in Physics without Masters in physics. Similarly you should have maths as core subject to do M.Sc. in maths. Chemistry honours students cannot do maths honours if they don't have maths.

In order to excel in exams, students need to be extremely well-versed and have an in-depth understanding of all the textbook lessons. NCERT Solutions by Swiflearn can be of great help if a student wants to score good marks in CBSE Board Exams. NCERT Solutions provided by Swiflearn are prepared by Subject Matter Experts who have a lot of experience in teaching. You can find NCERT Solutions for Class 10 maths over here: https://swiflearn.com/ncert-solutions/class-10/maths.

Yes, you can do the NIFT's M.Des and MFM courses after B.Sc. NID is another best option for pursuing the M.Des courses in various disciplines. For more details about the admission please visit the following.
1. For NIFT https://www.nift.ac.in/
2. For NID https://www.nid.edu/

There are not many career opportunities once you graduate with a B.Sc. Microbiology degree. Masters courses in this field are of two years:
Master of Science in Microbiology. Master of Science in Applied Microbiology. Master of Science in Medical Microbiology. Master of Science in Microbial Genetics and Bioinformatics.