Hi,

To appear for any examination, it is important to be familiar with the syllabus as it helps you to understand your weak points and strong points. Along with that it is equally important to classify the topics on the basis of their weightage and difficulty level so that you can work towards covering the topics in a efficient way.

Here is a link that you can refer for the syllabus for JEE mains 2021 along with the weightage: https://engineering.careers360.com/articles/jee-main-syllabus-weightage

I hope this helped you.