B.Sc

They have placements program but not sure for 100%, it depends on you how much you prepare for interviews.

Yes, you can do your B.Ed from any university, as they ask for graduate degree mainly.

At first, you will be studying the very basic and dominated by what you have already studied in class 11th and class 12th. So, you can actually do both, but hard work is obviously required here. Also, time management is very important.

You can do that, if you have chemistry, as one of the major subjects, as in B.Sc, Life sciences or B.Sc. Physical sciences.

Hey,
There is no such cut-off.
After the admission procedure, they will tell you about the entrance exam and all the other things.
You just need to crack the entrance exam, and the interview and get admission.
Good luck.

B.Sc Nursing is not included in NEET, so forget seat in nursing, you will have to go through the entrances.

Sorry, but you can't apply for KVPY. There are 3 streams SA (in 11 class), SB (in 12 class), SX (First year of Bachelor course), but you still have other options, like if you will be able to get admission in integrated Ph.D course, then you can get a fellowship from the institutes, but there are few institutes who give this fellowships.

Food Science will be the best option for you. Since you are already a Diploma holder in the related field.

Yes, you definitely can apply for IIT JAM 2019. Final year students can certainly apply for Masters courses, when in final year.

If you want to crack UPSC, then BBA will be easy for you to pursue. B.Sc will be quite difficult, and so will be the B.Com.