Hey there

Just intermediate level physics, chemistry and mathematics is not sufficient in your case in JEE mains paper 2 they'll ask you mathematical aptitude, also there will be a drawing section in which your imaginations are tested how you imagine a given condition in drawing there are various ways in which they'll test you.

Check details about JEE mains

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/exams/jee-main&ved=2ahUKEwiL0oGtreTkAhWF7HMBHcRFBAYQFjAAegQIBxAB&usg=AOvVaw1k3rMyr-Osb0qy4gsPfOaR

Good luck