B.Tech

I am no one to decide the best university for you. But I can suggest one good thing for you.
https://www.shiksha.com/resources/college-comparison
Please click on the link above. This is the online college/university comparison tool of Shiksha. This tool will show you all the difference between the c

No, you need to have maths with physics and chemistry as your stream in intermediate or 12th board to join in any B.Tech course.

Yes, you can join the aviation field after doing engineering in electronics. For that you have to take some training for a span of time period from the renowned aviation training academies. There are many categories in the aviation field that you can join like the ground crew, aircraft maintenance s

Your question is not clear. Have you completed B.Tech? Which is your branch? When did you complete your 12th board?

Top institute does not reject you on the basis of your academic percentage what they want to see is your consistency in performance you had 89 then suddenly 69 but you bounced back with 70 which is really good. what they see is, 60 and above in some cases and does not matter in many cases so don't w

https://www.shiksha.com/b-tech/colleges/b-tech-in-mining-engineering-colleges-india
Please click on the above link to get a list of good B.Tech in Mining Engineering colleges in India. Choose the best college for you by comparing the colleges with:
https://www.shiksha.com/resources/college-comparison

With rank 14896, you will not get any good branch in Heritage. All I can say is that you'll make the cut for any branch except CSE in NSEC, Meghnad Shah Institute of Technology, also a few branches at TISL, any in TIU and TICT.

Sorry to say but you haven’t cleared JEE Mains required cutoff. So there is no way to get admission in any college through JEE Mains. You may get admission in any private college through 12th percentage.