Hello aspirant,

You can check out below mentioned link for JEE Mains previous year's question papers and answer keys.

https://engineering.careers360.com/articles/jee-main-question-papers/amp

I'm providing you with the information about best Books for preparation of JEE Mains exam which are listed below.

Physics:

-NCERT Physics Class XI & Class XII

-Objective Physics by D.C Pandey

-Concepts of Physics by H.C. Verma

-Fundamentals of Physics by Halliday, Resnick and Walker

-NCERT Textbooks of 11 th standard and 12 th standard

Chemistry:

-NCERT Chemistry textbooks for Class XI and XII

-ABC of Chemistry for Classes 11 and 12 by Modern

-Concise Inorganic Chemistry by J.D.Lee

-NCERT Textbooks of 11 th standard and 12 th standard

-Complete NEET Guide: Physics by MTG Editorial Board

-Physical Chemistry by OP Tandon

-Organic Chemistry by Himanshu Pandey

Mathematics:

-Objective Mathematics by R.D. Sharma

-Mathematics by Arihant Publications

-NCERT 11 th standard Mathematics Text book

-NCERT 12 th standard Mathematics Text book

For more information about Best Books for JEE Mains can be available in below mentioned article.

https://engineering.careers360.com/articles/best-books-for-jee-main

For JEE Mains Sample question papers visit below mentioned link.

https://engineering.careers360.com/articles/jee-main-sample-papers/amp

You can check below mentioned link to get more information about JEE Mains Knockout, as they provide study materials, mock tests, etc.

https://learn.careers360.com/knockout-jee-main-april/

May this information was helpful to you.

Best of Luck!!