There is no any particular syllabus mentioned on the website, You can prefer the previous year papers, It will help you to know the level of the questions & can revise your class 11th & 12th Syllabus. You can check the previous year papers with the given below link.

Http://bhuonline.in/old-qus-paper-entr.html

The topics will be covered in the exam from General awareness, general mental ability, numerical ability, comprehension and conceptual awareness of the subjects including plants and animals, environment and pollution, human body, human health, common diseases, population explosion, production of food and raw materials, solar system, climate and weather, natural resources & industry and elementary level knowledge of history, political science, social studies, psychology and economics.

Good Luck!