IIIT

Hello Karthik,
As per your marks, there are really low chances to get a good NIT. I think your rank will be around 1.5 lakhs-2.5 lakhs.
So even if you get admission in NIT it will not be a top one. You may get NIT-Agartala, Meghalaya, Sikkim, etc., they are not equal to top NITs like Trichy, Warangal, etc.
As the official cut-off ranks have not been released you may refer to the link below that gives you the closing and opening ranks for 2016 to check your possibility:
http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx
You have cleared JEE Mains so there are some chances for you to get admission in NIT.

Getting admitted to newly formed institution is of great risk, I don't know whether they will be good or not.
But, CSE of IIEST, Shibpur is a great department, be its students selected in Google Summer of Code or Linux foundation or be it Microsoft and Google placement offers. But placements are not all about the CODEIIEST society. It is also good which collaborates with Robotics Society -"ROBODARSHAN" or seminars.
It will surely develop and upgrade facilities in the upcoming years.

No chance, the cut-off for IIITs are very high.

As per your marks, you cannot get admitted to the institutions you mentioned. But, as per previous year trends, you cannot get admitted into IIEST or BIT, Mesra.

Tell me your category. But, usually in general, you need minimum 80% marks in best five and also, 80 marks in maths separately.

Kindly use the college predictor app. Hope this will resolve your query. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
All the best.

Hi Dhananjay,
Thapar University's first cut-off for BE/B.Tech has been released on their website, you can follow this link to view the same:
http://www.thapar.edu/images/admission17/UG_Cut-Off_1.pdf

Hello Amit,
A minimum of 60% in Physics, Chemistry and Math is required in the boards for admission in IIIT. The admission is primarily based on the JEE Mains exam scores. So if you have appeared and qualified in JEE Mains with a good then you can get admission in IIIT.