Jee Main, Jee Advanced  MHTCET,, COMEDK,, KCeT, TNEA are some top examns. 

However this will najorly depnd on which college you are targeting and exams mandatory for such colleges. 

List of all petrochemicals engineering colleges and exams accepted below. 

https://engineering.careers360.com/colleges/list-of-petrochemical-engineering-colleges-in-india