Hello Mitali, the best way to prepare would be revise the topics that you already know and make that even stronger, so that you don't at least miss questions from that. Then, you should focus on Inorganic chemistry which has a weightage of about 35-35% in JEE Mains, so you can start memorizing in the last 2 months. You can prepare for some of the topics of 11th class, because those are easier.

Hello dear student,

We all know just 2 months are left for JEE mains but your students don't worry just buckle up this is the time when you should concentrate and you should study because if you will be scared of the exam then trust me you won't be able to score marks in IIT jee because you're too scared of the exam. So just go to NCERT if you take a topic to study d then solved questions according regarding the to the topic that will help you to gain confidence in the topic and also what are the type of questions that can be asked in exam I would suggest you to solve previous year questions because that helps you to build knowledge of the subject and also show some where you understand tricks to solve problems. I hope this was helpful

Best wishes