Dear Aspirant

I hope you are doing good . As per your query , I will try my best to help you out

One year time period is enough for cracking these exams , you just need to follow one proper roadmap . Break the 12 month into 4 halfs of three months each.

For physcis , follow the SL aora and hc verma , and try to focus on easy topics like kinematics , optics , molecular gravitation

For chemistry , follow the pradeep book and exam idea cover chapters like solid states ,organic chemistry ,inorganic chemistry ,thermodyanmics

For maths , only cover calculus throoughly that would be sufficient

In last 3 months only do mocks and anaylse them

Hope you found this answer helpful. Good luck for your future