Engineering

This year, there is no such kind of criteria like 75% in order to get admission in IIT but I suggest you to prepare a backup plan in order to take admission in the colleges. Since there is both the chances of applying this criteria in next year or may be not.
Best of luck.

I will suggest you to study BA because in civil service exam, most of the questions are coming from the areas like history, geography, current affairs, politics etc. It's better to improve your standard/base through studying B.A.

Dear student,
This year, there is no criteria for 75% in 12 in order to get the seat in IIT. It might there is chance that next year too this will be applicable. So, I suggest you to focus on preparation regarding the Fee 2019 and if you think it will be better to go for improvement then go ahead. If

Both are good. It depends on interest. Mechanical is evergreen branch and good option for public sector as well as government sector. IT is different and more demanding branches at present time and day by day new technology developed.

Yes, shift doesn't matter. If you have taken admission in full time course, then it will be considered full time. Shift doesn't matters.

I think you should solve some extra Questions for Chemistry like IP Chemistry OP Tondon, Modern ABC for Chemistry. These books have wide variety of Questions to solve.

As per past records, it is very difficult to get admission.

Go for the Shiksha Official website for the list of Colleges according to cities, Branches, Certification etc.

You should prefer the Shiksha Official website, there you can get list of colleges and select Colleges by different categories.

You need at least 75% marks in +2 and above 200 Marks in JEE Mains. And, you are also from general category you have to make a lots of efforts.