hi, I will suggest you to fisrt refer to the NCERT books for basics because most of the questions comes from NCERT books. Make sure you also refer to the previous years question papers to get an idea of the exam and question pattern and MCQ type of questions that comes in the exam. After this, you can opt for the following books -

1. organic chemistry by OP Tandon 2. organic chemistry by Morisson Boyd 3. Inorganic chemistry by OP Tandon 4. Modern approach to chemical calculations by RC Mukherjee 5. Numerical Chemistry by P.Bahadur 6. Concise Inorganic chemistry by J.D.Lee 7. Concept of organic chemistry by M.S. Chauhan 8. Organic chemistry by Arihant Prakashan. 9. Inorganic chemistry by Arihant Prakashan.

Hope it helps

Hello Ishu,

The best books for the preparation of JEE Mains is NCERT books for all the subjects. 

For the organic you can prefer O.P. Tandon and for the inorganic chemistry you can prefer J.D. Lee.

And, solve the practice paper it helps you.

Hope this will help you. All the best.

Firstly I would suggest you to go through well with NCERT books, It will help you to build your basic Fundamental Strong.

You can prefer the other books to prepare the Chemistry given below link.

Modern Approach to Chemical Calculations- RC Mukherjee

Organic Chemistry- Solomons and Fryhle

Concise Inorganic- J. D. Lee

Organic Chemistry- Morrison and Boyd

University Chemistry- Freedman and Young

Physical Chemistry- N Awasthi

Arihant's Practice Book Chemistry for JEE Main And Advanced- R.K Gupta

Good Luck!