Hello sayantan greetings

IN JEE Main and most of the competitive exams the chapter wise weightage is not fixed and it keeps on changing every year also you cannot predict how much questions will come from a particular sceptre and you need to focus equally on all the topics but you can take help of the previous years chapter wise distribution to understand which sector has more importance but even though you cannot make any conclusion because there are various changes in the number of questions ask from a particular chapter therefore you can select a bulk of chapters in which you can give more attention to score better marks.