Syllabus of these exams are based on your 11th and 12th class only. You should refer to NCERT books for your preparation.

You can check the syllabus from the given below link

Manipal

https://engineering.careers360.com/articles/mu-oet-syllabus

VITEEE

https://engineering.careers360.com/articles/viteee-syllabus

BITSAT

https://engineering.careers360.com/articles/bitsat-syllabus

Good Luck!!

The main sections for all 3 exams are mentioned below.

Manipal Syllabus

Physics – 50 Questions

Chemistry - 50 Questions

Mathematics - 70 Questions

English & General Aptitude - 30 Questions

Total Number of Questions- 200 Questions

Check the complete syllabus here

VIT Syllabus

Physics – 40 Questions

Chemistry - 40 Questions

Mathematics/ Biology - 40 Questions

English – 5 Questions

Total Questions- 125

Check VIT syllabus here

BITSAT syllabus

Physics – 40 Questions

Chemistry - 40 Questions

Mathematics- 45 Questions

English- 15 Questions

Logical- 10 Questions

Check the complete syllabus here