Important topics of PCMB for mh board 2019
Every chapter for 12th Boards is equally important.
A student will not be able to understand what is electromagnetic induction if he/she didn't study current electricity. That is every chapter is dependent in some or the other way to previous chapters.
I suggest you to cover the maximum syllabus you can to score high.
If you still have any queries feel free to ask in the comment section down below.