Dear Arun,

Some best chemical engineering colleges in Tamil Nadu are,

1. University Departments of Anna University,Chennai
2. Coimbatore Institute of Technology,
3. Sri Sivasubramania Nadar College of Engineering
4. Sri Venkateswara College of Engineering
5. Kongu Engineering College
6. Erode Sengunthar Engineering College
7. St. Joseph's College of Engineering
8. Sriram Engineering College
9. Arunai Engineering College
10. Adhiyamaan College of Engineering (Autonomous)

check out the link for further information

https://engineering.careers360.com/colleges/list-of-chemical-engineering-colleges-in-tamil-nadu

For further information on MGM's Jawaharlal Nehru Engineering College, and Tamil Nadu college of engineering, Coimbatore, check out the link

https://www.careers360.com/colleges/mahatma-gandhi-missions-jawaharlal-nehru-engineering-college-aurangabad#courseOffered

https://www.careers360.com/colleges/tamilnadu-college-of-engineering-coimbatore