I don't know about which examination you are talking about, but the Objective Chemistry App is quite a useful one but its not entirely sufficient. If you are preparing for JEE MAINS then you should go through the books of chemistry such as:

• Modern Approach to Chemical Calculations by R.C. Mukherjee
• Concept of Physical Chemistry by P Bahadur
• Physical Chemistry by P.W. Atkins
• Organic Chemistry by Morrison & Boyd

All this books are good for practicing problems. Now if you are up for NEET, then I would recommend you to go for the books as stated below:

• Physical Chemistry by OP Tandon

• ABC of Chemistry for Classes 11 and 12 by Modern

• Concise Inorganic Chemistry by JD Lee

• Dinesh Chemistry Guide

• Practise books by VK Jaiswal (Inorganic), MS Chauhan (Organic) and N Awasthi (Physical)

You can also follow this books for state level entrances as well.

To know more about the JEE MAINS 2022 books, visit the link below:

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

To know more about the NEET 2022 books, visit the link below:

https://medicine.careers360.com/articles/best-books-for-neet

I hope this answer helps. All the very best for your future endeavors!

Hello!

You can take help of it, but i will suggest it is always best to practice it from the previous year papers Or sample papers. You get idea of how questions will come and how twisted it can be.