Dear Student,

All the chapters as mentioned in your syllabus for the certain exam will be important. Instead of focusing on the important chapters , focus on important questions for all the chapters, work equally hard for every lesson.

https://www.shaalaa.com/search-important-solutions/maharashtra-state-board-hsc-science-general-12th-board-exam_573?subjects=physics_754

Refer to this link for questions

All the best!