IIIT

Hello Devesh,
As per your marks, your chances are nil for getting admission in IIIT-Raipur, however, check here for more insights:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
All the best.

Both the certificates are valid.
Usually, the JAC committee accepts any of the certificate produced by the students.

It depends on the NIT or IIIT cut-off ranks for CSE branch. If you are qualified with big margins between your score to cut-off marks then there are high chances of getting the colleges. I am attaching a link in which you can predict the college that you will be getting on the basis of your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best of luck.

It is nearly impossible that you will get any IIIT or GFTIs based on this rank because GFTI take admission on the basis of All India Common Rank list. So, All India Rank for getting any branch in IIIT or GFTI closed around 45-60 thousand.
All the best.

IIIT is good choice but again there is a good private college LNMIIT. For CS LNMIIT is good. IIIT is a brand but there are some IIIT who are actually worth it. You can trust with LNMIIT if fees is not your concern because there fees is 1.5 lakhs per semester which increases in further years and is much more than IIIT. If you go for IIIT then also that will be a wise decision. Thapar is again good but cost is even more high. Better to opt for IIIT or LNMIIT.

Hello, Hope you are doing well. It depends upon which branch you wish for. There are 100% chance if you wish to have EEE, Chemical like core branches. And fair chances to get into IITs, wait till last round of counselling.

You have a very less chance of getting a seat in NIT.
But, you may have credibility of getting a seat into IIIT.

In all honesty, it depends on the pace of work done at your institute. There is a slight chance majority of your degree won't be completed at your own campus, but highly unlikely that you'll complete 4 years not being at your campus.
Again, it depends more at the pace of work and how fast the government gives out clearances to your institute. I have seen some work finished in a jiffy (I study at a government institute as well) and some which has been going on for years and is yet to finish.

You will definitely get a college with your profile. You have got a decent rank so you have high chances to get the branch and college of your choice.

It seems difficult for you, but you may check the options available for you:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor