Is there any probability to get air1 in jee advanced by only the preparation of 8 months for jee advanced 2021?

Hello student result is important but what's more important than result is your dedication and commitment for achieving your goals so let's keep aside if it's possible or not to achieve AIR 1. You need think like every year one aspirant secure rank 1 like you and you're also an aspirant so work hard practice much so that in case if you secured rank 2 instead of rank 1 you won't regret that I didn't put my 100 percent in preparation, prepare enough so that you can say after result I'm satisfied I've done preparation for this only.

Prefer NCERT to build your basic concept and make sure you do each and every example and exercise questions of Ncert before jumping to a reference book after completing ncert thoroughly refer to your coaching material or any reference book as mentioned below.

Concept of physics by HC VERMA
OP TONDON CHEMISTRY
Rd Sharma Mathematics
Arihant practice book

Make sure you practice 5 previous year question paper.
You can also subscribe to careers360 knockout package for preparing and qualifying the entrance examination, it offer you 100 percent money back guarantee if you do not qualify.
Refer to the link mentioned below - https://learn.careers360.com/knockout-jee-main-april/

Feel free to comment if you have any doubt
Good luck