M.Tech

Hello Ayub,
Normally, colleges insist on GATE score for admission to PG courses. But this institute is actually a deemed to be University. Hence it's rules could be more student friendly. I am attaching a link that will give you some information and also enable you to make further queries.
https://admissions.hindustanuniv.ac.in/?utm_source=website&utm_medium=quick-enquiry&utm_campaign=admissions2018

LIT-Nagpur is the best option to do M.Tech in Chemical Engineering. It provides 100% placements to M.Tech students. The campus and faculty of this college is simply world-class.

I am not sure about Jaipur University. But nanotechnologist get an average salary of 10 LPA.

Hello dear,
Please give us your rank by which we can help you better,
Use TS EAMCET 2018 College Predictor:
https://www.shiksha.com/b-tech/resources/ts-eamcet-college-predictor

It is quite difficult to takw admission in any of the college for M.Tech without appearing for any of thw entrance exam. But still there are some hopes, you can approach some of the Deemed university.

No, M.Tech in housing is very limited in terms of applicability and industrial demand.

If you are able to pay the fee required then you may get admission in Amity easily. You may need recommendation to get admission.