Hello Aspirant.

First of the the thing to be noted is that the JEE main paper doesn't comes with same marks distribution to each chapter each year. The weightage of each topic changes every year. For example- A topic which might constitute 20 marks to paper in previous years might just be of 4 marks in the current year examination.

The point is that the weightage of any chapter isn't fixed. You need to study all as no can predict which chapter would appear with highest weightage.

To have a idea of last year's weightage of chapters of each subject please go on link below

https://engineering.careers360.com/articles/jee-main-syllabus-weightage/amp#referrer=https://www.google.com