Hi Ritu , it's good to see that you will prepare for neet exam by yourself. And if you will study with some strategy then with smart work you will definitely clear you neet exam. In physics some most important chapters are Thermodynamics,optics electromagnetic induction and alternate current, electrostatic, current electricity, electronic devices. These chapters have more weight-age. Then in chemistry equilibrium, solution, coordination compounds,p-block, thermodynamics. And for biology all chapters are important. You can go through the below link for each and every detail that how should to prepare , which book you should consider https://medicine.careers360.com/articles/neet-preparation-tips

Good luck!!

Ritu, the MHRD did announce that NEET 2021 will be conducted with reduced and revised syllabus. But the topics haven't been revealed yet. So we are not sure of the topics that might remain or the topics that might be deleted. So what we would suggest you is to prepare from revised CBSE syllabus. You can check that at: http://cbseacademic.nic.in/revisedcurriculum_2021.html and prepare from this accordingly. And to prepare on your own for NEET 2021, you can try our NEET Knockout: https://learn.careers360.com/knockout-neet-may/