Hello Dear

Not an issue if you think that you are not clear enough with your Class 11th syllabus then you can also go with the important chapters of your Class 11th through which you can able to fetch the more score. Below the link is given through which you can able to check those also topics from PCM Domain where the questions will be generally asked including both class 11th and 12th.

https://engineering.careers360.com/articles/jee-main-important-topics-books

All the best

Hello Anchal,
To appear JEE main exam, you have to clear 10+2 exam. And 75% required for jee advance for IITs.
There are not any means of 11th i think.
Here is the eligibility criteria for JEE main
https://engineering.careers360.com/articles/jee-main-eligibility-criteria/amp
Good luck.

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