B.Tech

After the degree in Mechanical Engineering, learning into USE and get into jobs, this is what I would suggest in first place. If you are willing to pursue Higher Education and not job, then I would suggest doing M.Tech if you want to be a teacher of the subject. You can apply for MBA as well because many engineers make good managers after MBA.

Recorrecting your Exam name to UPSEE, you have excellent rank and you need not to worry. For HBTU, it takes through JEE Mains only. You can get into UP's top Universities such as UPTU's BIET Jhansi etc. and all such colleges accepting UPSEE.
PS : Kindly mention if the exam is different UPSEE . Best of luck and relax :)

Below is the official list of students merit list of Babasaheb Ambedkar Technological University. Kindly go through this:
https://docs.google.com/viewerng/viewer?url=http://www.cutoff365.com/wp-content/uploads/2016/04/CAPR-II_EN3033.pdf&hl=en_US

The highest package from NIT-Silchar is 35 LPA offered by World-Quant . The second highest package was from Irage - Capital of 20 LPA (off campus ) and third is 15.5 LPA from Snapdeal e-commerce.

Sorry, but the rankings are not enough and are too far from the closing rank even from home state quota for general category. Round about 220000 are the least for chemical engineering. Moreover, you'll get into Biotech which is around 3 lakh rank in home state only.
Best of luck.

There has not been any official notification for this . I would suggest you to visit:
https://www.jecjabalpur.ac.in/index.aspx
Their official website or call their head office on working hours on working days.
NO.-: +9176123 31953
Best of luck.

You can apply through JoSAA counselling and you will get your branch based upon your rankings. Mostly, the cutoff for CIVIL is around 40k all India and a bit more with home state quota.
Rankings are for general and can be assumed around 7k more for OBC. Kindly mention if you have SC or ST.

Yes, you can apply. To get admission, either you have to crack GUJCET or JEE Mains with good rank.

Sorry, but you will not be able to get into Nirma Unversity with these marks. Though the selection is dynamic and dependent upon the students applying for it and hence changes every year, still the cutoff for CSE/IT is around 2k and the least non-technical branches is around 80k.

Yes, you'll get into HBTU with this rank. Moreover, you'll not be able to get CSE for sure as the previous cutoff for HBTU CSE is too far from your rank so its likely to deviate. Moreover, you'll get branches such as Mech, BIOTECH , CIVIL, EEE , IT/ECE (less chances).
Best of luck.