After completing diploma inChemical engineering colleges how to get addmetion in b.Tech in chemical engineering college's suggests me some good college details and placements

There are different literal entrance exam in different states
Like that
AP ECET - Andhra Pradesh Education Common Entrance Test

UPSEE Lateral Entry - Uttar Pradesh State Entrance Examination

TS ECET - Telangana State Engineering Common Entrance Test

Haryana LEET - Haryana Lateral Entry Entrance Test

WB JELET 2021 - west bengal lateral entry entrance test.

Delhi Technological University for lateral entry into the B.Tech courses offered

International Institute of Information Technology Hyderabad offers lateral entry to dual degree programmes

Best lateral entry b.tech college for chemical engineering is

Bharati Vidyapeeth Deemed University College of Engineering, Pune

Heritage Institute of Technology, Kolkata

Jadavpur University, Kolkata

DSCE Bangalore - Dayananda Sagar College of Engineering

RVCE Bangalore - RV College of Engineering

Manipal University, Jaipur

Chandigarh University, Chandigarh

To see  more chemical engineering colleges in india with different exam visit here

https://engineering.careers360.com/colleges/list-of-be-btech-in-chemical-engineering-colleges-in-india

Thank you. I hope this answer helps you.