IIIT

Hello,
Hope you are doing well. Yes, definitely you will get IIIT or NIT with this rank in JEE Mains along with your branch. For your reference, I am attaching a link for you so that you will get the tentative college you will get based on your marks.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7489993.

I think it is very difficult. But you may try some other colleges which give admission even if you are qualified in JEE Mains. I don't know the colleges exactly which provide such admission. In addition to that, it is also advisable to go for JoSAA options entry as many seats are being vacant in the past few years.

I think it's difficult for you to get MNNIT CSE if you belong to general category. According to me, both are good, but in MNNIT, you can opt for IT and after 1st year if your CPI is good (above 8.5) then you can change your branch to CSE.

One should have scored at least 75% marks in class 12th examination. Apart from this, there is no other condition of 12th board percentage is required for admission in NITs and IIITs. And also there is no any official benefit of having a good percentage in 12th.

Hello Veman,
To get admission at NITs or IITs, you are required to have a good score in JEE Mains and Advanced. But, it is mandatory that you have a minimum of 75% (for reserved categories) or 65% ( for unreserved categories) in board exams to be eligible for the admission. Even if you have a top rank in JEE exams, if your score in boards is not as required, then you will not be able to get a seat.

You need to qualify JEE Mains. You should score above 75% in HSC.

Visit the link below to find the colleges on the basis of your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

For your answer, I am providing you a link. Please insert the AIR and the list of colleges that you might be getting on the basis of your rank will appear-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Hope your query is resolved.
Best of luck.
For any other query, please feel free to ask me.

Friend, there is no chance of getting NITs or IITs. You can get state government colleges or you can go for other private colleges available.

You should prefer IT at IIIT Lucknow.