I want to score 40 marks in chemistry in jee mains. Which chapters should I study?

It matters on which exam u r going to appear wheather advanced or mains because the weightage for both exams is slightly different.U must study alcohols phenols ketones, reaction mechanisms for org. Chemistry as the weightage for organic chemistry is increasing if u have seen previous years papers.Thermodynamics and equilibrium.For these chapters States of matter is a base topic.Memorize all formulas in physical chemistry.Isomerism especially stereotype is very important.Solve refrence book questions.ALL THE BEST.REGARDS