Science

You can eligible to apply for BE in Chemical Engineering, after completing class 12th Science with Physics, Chemistry, Mathematics with at least 65 percent.

Hi,
You can't apply for NDA before class 12th
Qualification Criteria:
For Army Wing of NDA Candidates should have qualified 10+2 or equivalent examination from any recognized board. For Air Force & Naval of NDA and 10+2 Cadet Entry Scheme at the Indian Naval Academy: Candidates must have passed 10+2 o

As you have completed your graduation in BSc, you can apply for MSc in Food Science.

Hello,
Normally speaking the process for PG exam in Nursing will begin after results for graduation from same stream are declared. I am attaching a link that will give you all the required information about admission process for MSc in Nursing.
https://www.shiksha.com/nursing/course/m-sc-in-nursing-me

It is possible, but you have to get approval from both the colleges/ universities before initiating the change

Yes, you are eligible for the same.

https://www.shiksha.com/college/pims-padmashree-institute-of-management-and-sciences-kengeri-bangalore-25409
Check out this link

Candidates who have completed their graduation in event management or any other discipline, or are appearing for their final graduation examinations are eligible to apply for these courses. They must have secured at least 45% marks in graduation in order to qualify for the MBA programme. This is the

Candidates who have completed their graduation in event management or any other discipline, or are appearing for their final graduation examinations are eligible to apply for these courses. They must have secured at least 45% marks in graduation in order to qualify for the MBA programme.

https://www.shiksha.com/medicine-health-sciences/dietics-nutrition/colleges/colleges-Pune
Also visit http://www.ssou.ac.in/campaign/bsc-facebook/.