Hi

No, the syllabus of both class 11th and 12th are different be it cbse board or any other board .

This is because,

Both Class 11 and class 12th are 2 seperate class and thus having different syllabus just like how you had different syllabus in your class 9 and class 10.

You can get cbse class 11 and 12th syllabus for all the subject for tge session 2021 - 2022  by visiting the official website of CBSE the link for the same is provided below

http://cbseacademic.nic.in/curriculum_2022.html

Or,

Alternately you can visit our website the link for the same is given below

Class 11 syllabus cbse board :- https://school.careers360.com/articles/cbse-syllabus-for-class-11

Class 12 syllabus cbse board :-

https://school.careers360.com/articles/cbse-class-12-syllabus

The syllabus will be very helpful for you as it will let you know the topics and the chapters which are there so that you can start your studies and  preparae for the examination accordingly.

I hope that you find this helpful if you have any other doubt then do reach us

Thank you