Hello student solve previous year question papers and sample papers you'll get important topics and questions in that which regularly comes each year. Practice them as much as you can and analyse them so that you can improve.

To download and get the access refer to the link mentioned below - https://www.google.com/amp/s/school.careers360.com/articles/jkbose-10th-question-papers/amp

Feel free to comment if you have any doubt

Good luck