Chemical Engineering

Hello Logan, it seems that you have studied well for your JEE Mains examination. Your percentile score of above 95 is indeed exceptional. I am sure with this percentile you are bound to get the branch and NIT of your choice however to help you I am attaching a link that can predict college and branch for you based on your percentile score:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best wishes to you for your chemical engineering.

I am attaching a link that will give you all the required information about admission in ICT, Mumbai:
https://www.shiksha.com/university/institute-of-chemical-technology-mumbai-36791/admission.

Please follow the link for detailed information:
https://www.nitt.edu/home/academics/departments/chem/placements/

Yes, you can do B.Tech after Diploma. You can get admission to 2nd year of B.Tech course directly as you have completed Diploma course. The general admission process in most of the institutes is on the basis of entrance tests. There are several state level and national level engineering entrance tests. Although some institutes provides direct admission on merit based on qualifying exam.

Please visit this site first
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Hi Sana,
You can look for Bachelor of Engineering (Chemical Engineering) programs abroad. Now, abroad is a very generic term. You also have to choose the university, the country etc. Accordingly you must prepare since the entry requirements are also different. Depending on where you want to study you must take SAT or ACT, TOEFL or IELTS or any other assessment test. Some countries like Germany etc. May require knowledge of it's local language like German.