CBSE 10th

You must clear the 12th standard to be eligible for this diploma. You cannot apply for it after completing only class 10th, as this is not according to their eligibility criteria.

Students who have passed class 10th are eligible to pursue this course. This course can also be pursued after 10+2 Science stream.

Yes, there are Arts and Science available for junior college.

Students enrolled in XIth Standard (Science Subjects) during the academic year 2019-20 and having secured a minimum of 75% (65% for SC/ST/PWD) marks in aggregate in MATHEMATICS and Science subjects in the X Standard Board examination immediately in the preceding academic year are eligible to appear

After passing 10th prefer for the college which is near you city and after that you can go in delhi for bright future

Which course/Diploma are you talking about?

If your chemistry is not good then don't take the science stream, because chemistry is a major subject in science stream. You can opt for commerce stream with mathematics if your mathematics is good, it includes other subjects such as accountancy, economics, business studies and English.

Scholarships are only based upon your class 12th marks.

You may refer the link below to know about the admission details at DEI:
https://www.shiksha.com/university/dei-dayalbagh-educational-institute-agra-53469/admission
To know about the colleges where you could get admission via JEE mains, you may use the predictor tool from the link below :
https://www.s