I want to score 120+ in jee mains exam and iam giving more prefference to chemistry and iam leaving some chapters in physics and maths can
Yeah it is feasible to leave some chapter's in both the respective subjects but try to don't leave such topics from where the JEE usually pick up the most number of questions. There are few topics in both Maths and Physics which has the more weightage and from where you can be able to score the higher marks regarding that below the link is given.
https://engineering.careers360.com/articles/jee-main-important-topics-books
All the best
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