Hello Aspirant,
The admissions for 11th Grade in CBSE Schools are based on your 10th Grade Examinations along with the entrance examination if the school decides to do so.
As long as you have passed your Secondary School (10th Grade) Examination from any recognised Board of Secondary Education/Indian University and recognised by CBSE Board, you are eligible to take admission in any CBSE School for Science Stream - Physics, Chemistry, and Maths.
Some schools may also conduct an entrance test as a part of the admission process. In that case, you will be required to perform well in that as well.
Hope this helps, All the best!
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