There will be 100 questions to be done by all.

25 mental ability + 25 chemistry (for all streams).

50(zoology + botany) for biology students. OR . 25 maths + 25 physics for mathematics students. OR  50 agriculture questions for agriculture students.

The syllabus is the same as studied in class 11 and 12 for any entrance exam. Study from NCERT .

I hope I have answered your question.