B.Tech

Hi,
Check out this link:
https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-tamil-nadu/44-2-123-0-0

Hi,
You can refer to this link for a list of colleges:
https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-india/44-2-0-0-0

Hi,
You can compare these colleges here:
https://www.shiksha.com/resources/college-comparison

Math and physics is the base of engineering but as you are taking IT then there is less use of maths in this branch but there is used in every semester.

No, if you have not locked your 1st round seat then you can't get the college which is offered in the first round of counseling.

Yes, you can if you have taken admission in any open university such as IGNOU so that you easily continue your other course study with B.Tech but it has a lot of burdens on you.

Yes, there are few college who has this course please check the link provided for all the information about the college:
https://www.shiksha.com/b-tech/colleges/b-tech-in-dairy-technology-colleges-india

If you are weak then you can take classes regarding its subjects.

Hello Prakriti,
If you want to do a job then B.Tech is enough to find a job but if you want to do Masters or want to add something more to your title then you can go for MBA or M.Tech.
But I will recommend you if you want to go for a job then you keep on revising your course and go for company jobs.