CBSE 10th

https://www.shiksha.com/hospitality-travel/hotel-hospitality-management/ranking/top-hotel-management-colleges-in-Bangalore/98-2-0-278-0
Here you go.

Yes, you can visit this link http://www.thetourismschool.com/

No, you have to complete your class 12th with English (compulsory) with any stream.

Hi,
But, sorry this isn't possible. You should have took Maths in class 12th, if you want to do the same. You can only take up medical courses or Bachelor courses (without Maths). Thank you.

Your chances are quite slim. If your CAT score is good, you can consider colleges which give more weightage to CAT score.

Hello dear,
I am sharing you the link which will give you all basic idea of the exams from the eligibility, syllabus, exam date and other sorts of information. This will help you to clear all the doubts regarding your upcoming exams:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/university/national-institute-of-technology-durgapur/exams/amp/nimcet&ved=2ahUKEwi0wqPZ-qPbAhXMeisKHWNIBA4QFjABegQIBxAB&usg=AOvVaw0GFjLYbVUhmpEMJbG-FsR_&cf=1
All the best.

If you want to opt for B.Tech then do study till class 12th. It will prepare you for the coming years of your B.Tech. See if you want to end your school in class 10th and start pursuing higher studies, that is fine but it is your choice. Since you are saying you want to do B.Tech then I would suggest you complete your 12th and then directly do B.Tech. You can opt for Diploma after 10th and then do B.Tech through lateral entry.

Commerce is good option, not best. Career option is limited for commerce students. If you choose commerce, first understand the field of commerce, because your one decision decide your career. Best of luck.

Yes, you are eligible for Diploma course. Most Diploma doing guys I met in life started their Diploma after class 10th only. If you can I will suggest you to get over with your class 12th, and then go for any further studies. Plus, if you can go for a degree then do a degree instead of Diploma. Degree will be more helpful to you instead of Diploma in future I believe.