JEE Main

No, you are eligible to get seats in NITs. But, you can get any other government colleges. You can apply once the counselling lines are open.

No chance of getting NIT. But, there are also other good colleges
Try in them.
All the best :)

You should try for SVNIT for chemical as at this rank you would be able to get it. And for CS you can choose other NITs
All the best.

There are less chances of getting admission. But you should try till the last round. Hope you get the admission.

Yes, you are likely to get a seat in NIT, so don't worry about it.
You may not make up till NIT-K, NIT-W, NIT-T, but you can get NIT Rourkela, NIT Silchar and most of the IIITs.
If you go for top NITs, you may not get the desired branch but you can get a core branch in NIT Silchar.
In NIT Rourkela, you can get a dual degree in civil. Best of luck.

Yes, you can appear. Practice well and continue your studies. Don't take a gap.

I think, you can get one. You can get some good Colleges on the basis of this Rank. Go for the link below to find the list of colleges:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

On the basis of the rank obtained, you can get private colleges and may be government Colleges in your state. Go for the link below to know your chances of getting the Colleges:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Sorry, you cannot get any NIT college. You should try for some private colleges like JECRC, Arya college Jaipur, Poornima college, Chandigarh university, LPU and many more are there who take admission directly.

Friend, you can get private colleges on the basis of the JEE Mains as your marks is not good.