BITSAT & JEE MAINS both exams are differ in question paper structure but if you prepare well for the mains then it will easy to cover the bitsat syllabus easily. You need to focus mainly on NCERT books it will help you to clear your basic concept.

Here are some preparation tips you can follow:

Make your Study Schedule: You need to plan before starting your BITSAT preparation. And need to devide the time subject & topic wise.

Work on your Strengths and Weakness: The strong areas will contribute maximum to the score while the weak areas require maximum attention. Therefore, you need to rigorously practice questions from all the difficult topics.

Thorough Revision:

Revision is most important part if you want to retain the knowledge they have covered while preparing. Daily revision of whatever you have covered during preparation eliminates the risk of forgetting the information. Spend 2-3 hours regularly for revising old topics you have covered.

Use Sample Papers and Mock Test Series:

Refer to BITSAT previous year sample papers and past year question papers to check out the pattern of questions and the weight-age of important topics.

The books you can prefer:

1. Askiitians sample question papers for BITSAT
2. GR Bathla Physics MCQ Books
3. Himanshu Pandey- Organic Chemistry (GR BATHLA)
4. AS Singh- Physical Chemistry

You can prefer JEE Preparation books that will also help you.

BITSAT PREPARATION TIPS - Prepare according to your strength and weakness: After going through the BITSAT syllabus you must have known the areas of your interest and the areas that need attention. By practicing the portion which needs much attention can help you a lot in the last moment preparation as well as in the exam.

Revise, Revise and Revise: The best way to crack any entrance exam is by revising the subjects and the topics completed along with the preparing.

Practice Online: As BITSAT is an online exam, get yourself equipped to be comfortable for online exams. Practice as much as you can on computer only and appear as many sample tests as you can online only.

Sample papers and past year BITSAT papers: Practice from the BITSAT sample papers and the BITSAT past papers for a better understanding of the questions and the format they are to be asked in the BITSAT.

You can go through below provided books name as well - Comprehensive Coverage of NCERT Syllabus for Classes 11 and 12 (English) 4th Edition – Arihant Publication BITSAT Explorer 2016 (With CD) (English) by MTG Editorial Board BITSAT English Proficiency & Logical Reasoning PB (English) The Pearson Complete Guide to the BITSAT (English) by One Learn Education Comprehensive Guide to BITSAT Online Test – with Mosk Test CD (English) by Disha Experts 13 Practice Papers BITSAT 2016 PB 8th Edition by G K P

Hope this helps!!!