B.Sc Physics

B.Sc. Physics Hons is offered by the college and not applied physics.

You should visit this link:
http://univ.tifr.res.in/gs2018/Adm_Procedure/Adm_Procedure.htm

It actually depends on two things. One is vicinity to your place. So, if you can provide people the exact area where you are searching a college, it would be of better help for them to suggest you. Second factor is your score. Once you provide those information, I think people can guide you better and can come out with some specific colleges to suggest you.

In DU, selection is based on the merit in the sports you have in your 12th. Aggregate of top four subjects are taken. There is no entrance exam.

Both the courses are great and it depends on your interest and understanding. If you completely want to study physics in detail then you should opt for B.Sc in physics. Both the courses have an equal scope.

If you're interested in some sort of career, plan accordingly. For example, you want to be a chemist, go for a B.Sc in chemistry. Similarly, to be a physicist or if some research drags your interest in physics then be in physics.
If you are opting to settle for better, then, B.Sc chemistry is for you. Physics degree must be accompanied by a Master's degree, but a chemistry Bachelor's degree could do it better in fetching you a job. I, personally, had my uncle go for a job in a pharmaceutical company after he completed his B.Sc PCM (physics, chemistry and maths).

Please check for your eligibility to pursue MA in Geography at Allahabad University from the link provided below. You should be able to download college brochure which contains specific details regarding eligibility, admission process followed, fee structure, placement records, etc. Alternatively, visit college website for details regarding this course:
https://www.shiksha.com/humanities-social-sciences/course/ma-in-geography-university-of-allahabad-136100
(Website: http://www.allduniv.ac.in)
Regards.