Can I get a good rank in the JEE when I prepared only two subjects deeply in physics and chemistry?
For jee mains you can’t take risk of leaving even 1 chapter if you are aiming for 99+ percentile because mains is unpredictable as in 2022 maths was not at all fully doable for an average aspirant so I will recommend you to study all subjects for mains at least.
Now for advanced you can leave your 1 subject weak but not that much weak that you are struggling even to qualify subject wise cutoff so please be careful in that case as I have seen students failing advanced just becoz of that and if you make your 2 subjects very very well than you can go easy on 3rd but I would you to go for all 3 as one can’t expect in advanced which subject could be easy or tough.