For the Class 10th Polytechnic exam syllabus, you'll need to focus on Physics, Chemistry, and Mathematics topics from the 10th standard curriculum, with some exams also including Hindi/English comprehension, reasoning, and general awareness.

Physics:

Topics from the 10th standard physics syllabus, including mechanics, electricity, magnetism, light, and heat.

Chemistry:

Topics from the 10th standard chemistry syllabus, covering elements, compounds, chemical reactions, acids, bases, and salts.

Mathematics:

Topics from the 10th standard mathematics syllabus, including algebra, geometry, trigonometry, and basic statistics.

For further reference you can go through this link:

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

Hopefully this answer is useful to you.