Hello.
11th and 12th Chemistry is divided into 3 parts
Organic Chem. :
If you're preparing for CBSE
Arihant has beautifully explained concepts and enough questions for practice
If you are preparing for JEE
OP Tandon (has both theory and numericals)
Himanshu Pandey or MS Chauhan (for numericals)
Inorganic Chem. :
NCERT is more than enough for both CBSE and JEE
Physical Chem. :
For theory and concepts : Pradeep (is expensive so prefer 2nd hand) (also has enough numericals for CBSE
For numericals of JEE level :
RC Mukherjee or P Bahadur.
You can even learn from BYJUS or on YouTube.
Hope this is helpful.
Good luck.
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