Diploma

After your diploma course, you can take admission into Architecture.

12-year experience in Hotel management is an advantage if you are looking for Masters in the Hospitality sector. You can target for GMAT and pursue 1-year executive MBA from institutes like Great Lakes, ISB-Hyderabad, MDI-Gurgaon or IIMs.

Hello Shubham,
You may refer the link below for the list of colleges for diploma in chemical engineering:
https://www.shiksha.com/engineering/colleges/diploma-chemical-engineering-colleges-india

Yes, you can go for B.Tech lateral entry mechanical engineering in all the college of India after diploma in the same course of mechanical.
All The Best.

You can go for B.Tech lateral entry in B.Tech after diploma in mechanical engineering or you can go for BCA or BBA as all these has good career only when you study well.

You are advised to appear for JEE Mains and JEE Advanced exam to seek admission in IITs after completing Diploma in engineering.

Hello Bhakti,
I think only those who have completed 10+2 system only are eligible. For the eligibility conditions, you may refer the link below:
http://chennai.vit.ac.in/admissions/eligibility