I am a 9^th grader who aims to do engineering in iit. Any tips on how to get into iit and the areas where most marks can be scored

Since from starting it had noticed that the chemistry is most scoring subject for iit. It is so because every years the ques. From chem.is based on the ncert. So clear ur concept of chem.through ncert and the best way to crack iit is to keep ur concept clear on all topic,revise them properly.