Diiksha if you are trying to go in any colleges via JEE Mains/Advance then you should at least have 75% in 10+2. Else you will need to check individually the eligibility criteria for each colleges.

Dear Student,
Yes you can definitely take admissions in colleges in Delhi and Delhi NCR alongwith almost any college in India as the eligibility criteria for most of the colleges in India and for almost all the courses is that you are required to have minimum 50% in your 12th. Other than that the admission procedure and eligibility varies from college to college and for course to course. You might not get admissions in colleges having admissions on the basis of your 12th percentage like DU but will definitely get admissions in colleges having direct admissions like Amity University or with entrances if you clear that.
Hope this might help you.