Engineering

The cut-off marks for JEE Advanced varies from year to year and also depends on the category you belong to. As per the latest information available, the qualifying cut-off for JEE Mains 2022 for general category students was 89.7548849 percentile, which corresponds to a score of 105 marks out of 300. As you have mentioned that you have scored 72 marks in JEE Mains 2nd attempt in 2022, it is unlikely that you will be eligible to appear for JEE Advanced 2022 as you did not meet the qualifying cut-off for the general category. However, please note that the cut-off marks for JEE Mains and JEE Advanced may change based on various factors, including the difficulty level of the exam and the number of applicants, so it is best to check the official website of JEE for the latest information on the cut-off marks. It is also important to note that JEE Advanced is only open to the top 2.5 Lacs candidates who qualify in JEE Mains, so even if you had MET the cut-off, there is still no guarantee that you would have been eligible to appear for JEE Advanced.

The admission process for NITs (National Institutes of Technology) in India is based on the performance of candidates in the JEE Main exam. Along with the JEE Main score, the eligibility criteria for admission to NITs also consider the category of the candidate (General, OBC-NCL, SC, ST, etc. ), the candidate's state of eligibility, and other factors like the number of seats available, the number of applicants, and the cutoffs set by individual NITs for each branch. To determine whether you can get into an NIT with an OBC percentile of 90 in JEE Mains, you need to check the previous year's cutoffs for the NITs and the branches you are interested in. The cutoffs can give you an idea of the minimum JEE Main score required for admission to a particular NIT and branch. However, it's important to note that cutoffs can vary from year to year, and they also depend on various factors such as the difficulty level of the exam, the number of applicants, and the number of seats available. So, while the previous year's cutoffs can give you an idea, they cannot guarantee admission. In any case, scoring a percentile of 90 in JEE Main is a good achievement, and you have a good chance of getting admission to an NIT. However, the final outcome depends on various factors, and you need to keep an open mind and explore all your options.

Analyzing the previous year database of marks vs percentile, you need to score 65-75 marks out of 300 for getting a percentile of 85 in JEE Mains. In the 2nd session, you will definitely be able to score good marks, and not only 85 percentile but you can score even more. For securing 85+ percentile, you need a target score of around 75-80 marks out of 300, which is not difficult at all. Chemistry Read some of the important chapters from NCERT, especially Inorganic Chemistry No matter how much you hate it). Chapters like Atomic Structure, Periodic Properties, Chemical Bonding, s Block, States of Matter Coordination Chemistry Chemical Kinetics, Solid State, Surface Chemistry etc. Can be easily covered in a month. Also, stay away from Thermodynamics if you haven't studied it till now ) and p- Block; they will demand a lot of time. In Physics, select the easy chapters, those which are only formula based, like Waves Modern Physics Electric Current, AC. You can score enough from them to reach 90 percentile. STAY AWAY from Rotation, COM, EMI and other conceptually heavy topics. Mathematics: Focus on Coordinate Geometry and Vector 3-D, Sequences and Series, Quadratic Equations, MOD. STAY AWAY from Integration; It will disintegrate your preparation and confidence (bad pun)
DO NOT skip the JEE Main Topics like Semiconductors, Mathematical Reasoning, Environmental Chemistry. They are easy and sure to be asked in the paper. Solve a couple of JEE Main 2020 papers and you are good to go!