Hi Rohit,

I'm providing you with the link, through which you can download JEE Mains previous year's question papers in Hindi.

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

Here 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

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

°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

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 useful.

Best of Luck!!