B.Tech

Yes, you will easily get Computer science engineering branch in Birsa Institute of Technology with this rank. Same is the case for mechanical engineering. Wait till the last round. You may also get civil engineering there.

Kindly visit this link:
http://www.google.co.in/url?q=http://www.vrsiddhartha.ac.in/syllabus/vr10-mtcse.pdf&sa=U&ved=0ahUKEwiVg8T5w4PUAhVDvI8KHc3VC0YQFggPMAA&sig2=TiUk8kP1I3_pI4NoYspqBA&usg=AFQjCNF4vXZZwxBZAh191RhDhc-or99W3g

Both branches are equally good and very good job opportunities. CSE has an edge over Mechanical Engineering in term of job opportunities based on last few years data and job market forecast.

Hello,
You can do your B.Tech or complete your Bachelor's degree in any field. MBA programs are open to students from all disciplines. However, if you are planning to apply to USA or Canada most universities will prefer a four year Bachelor's degree. Secondly, any top MBA program prefers applicants

You can take admission in the colleges like PEC College, Punjab University, etc.
And the JEE scores are dependent on the counselling procedure of the colleges.

It depends on you that in which course you want to take admission like:
Animation and multimedia
Writing and journal
Event management
First, check out on the internet which course you want to do then take a decision.

Yes, there are many colleges which can offer you admissions as you belong to SC category. Keep trying.

No, actually, the real reason why they are upper in rank is that the total number of research papers published, number of placements, number of GRE and GMAT qualifiers and many other factors form that ranking.

Yes, you'll get admission with your JEE Mains rank. Complete the online counselling process. You'll get choices of colleges all over India based on your JEE Mains score.

If you stay in Delhi, then you have bright chance og getting IIIT Delhi.