Uttar Pradesh

Hi Khushi, the cut-off for Pune this year is 95, so it's not possible for you to get Pune. But Noida, maybe yes. Keep checking the merit list which is being put up in the official website from time to time.

You can do MBA, M.Com, etc. for your interest in accounts. Do preparation for government jobs by side.
All the best.

First, visit this link to check B.Arch colleges based upon your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
Then visit this link for various colleges which will provide you the brochure:
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india

You can check placement stats here:
http://www.mnnit.ac.in/tnp/placement/placementarchive.php
http://www.nitkkr.ac.in/sub_courses.php?id=371&id3=115
and I think MNNIT is the best, in terms of placement as well as learning.

You are in general category, so your chance is very low.

If you are getting chemical at old iits I would say go for it. Old IITs (Delhi, Mumbai, Chennai, Kanpur, Roorkee, Kharagpur, Guwahati), else compare each IIT placement and MNNIT placement then choose accordingly.

Everything depends on category, and the cutoff which varies from year to year. For general category, 15k rank may be the last at which you can get admission in MNNIT.
For mechanical engineering, it can be 7k approx

Admission in MMM, Gorakhpur is based on the score obtained in Uttar Pradesh State Entrance Examination (UPSEE). Go through the UPSEE college predictor link below for details:
https://www.shiksha.com/upsee-college-predictor

College change or university change after the first year is completely dependent on college and university norms, some university allow it and some won't plus you need to have good scores in the first year to apply for the same.
For further details, contact the college authorities.

Please refer to the link provided below for a detailed comparison between these two colleges for CSE. You should be able to compare various features of each college which should help you decide which college is better and where you would like to study. Regards. https://www.shiksha.com/resources/college-comparison-190810-86916.