tuff questions on science in chemistry

Hello,

Since you are asking for tough questions in chemistry amazing that you are preparing for JEE advanced and for that you can follow these books.

For organic :
Advanced Problems in Organic Chemistry byMS Chauhan.

Physical Chemistry:
Problems in Physical Chemistry'by Narendra Avasthi.

Inorganic Chemistry:
Problems in Inorganic Chemistry for JEE Mains and Advanced'by V.K. Jaiswal.

Cengage series is also very good.

I hope this helps.