B.Sc Physics

Yes, you can apply but I think you should go with physics because it would be better for future job and salary too.
You are already a graduate in physics and experienced, so I think that you should do Masters in the same subject.

If you have interest in physics subject then you may pursue B.Sc physics from UPES-Dehradun as UPES has all the degrees in petroleum only.

B.Sc in any branch of chemistry may not fetch you a good job. Moreover, you will not have a proper career growth. Masters in analytical chemistry will have a wide scope. You will have plenty of opportunities in pharmaceutical industries.

You should opt for applied physics as that will give you an added advantage in your career.

Yes, you can. I think in the 2nd cut-off of DU, you should get admission in DDUC.

After completing B.sc you can apply for M.sc in physics. And your eligibility is depends on merit of this university.

Hi,
Candidates should have a Bachelors Degree in appropriate branch or equivalent with a minimum of 50% marks in aggregate to apply for M.Sc. in Physics in St. Joseph's College, Bangalore. Admission to the PG Diploma courses is done on the basis of marks secured in the entrance examination conducted by the authority and/or personal interview.

Hi Bishal, Admission to the Bethune College Kolkata is strictly done on the basis of merit, I. e. , the percentage of marks received by the candidate for her Higher Secondary or any equivalent exam. However, for admission to English and Bengali Honours courses, you need to appear for an entrance test. The overall percentage required is 60%. I. e; Physics - 65%
Mathematics - 60%
English - 50%. .