NIT

https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7476690
Check this out.
Hope this helps.
Best of luck.

Hello Himangshu,
In PCM, you need to have a minimum of 65% to qualify for admission into NITs. You also should have a good score in JEE Mains.
All the best.

Hello Mahender, I am attaching a link that will give you all the required information about predicting NIT. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

For NITK (Surathkal) cut-offs, check the link below:
https://www.shiksha.com/college/national-institute-of-technology-surathkal-mangalore-24187/admission#admission

CS at NIT PATNA.

Hello Abhishek,
As per your category and marks, your chances are there to get lower IIITs or NITs in the last phase of counselling, however, check here to know more:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
All the best.

Hello Ajay,
Yes, if you secure a rank near 10K, you will definitely get top NITs, however, check here for more insights:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
All the best.

For your answer, I am attaching the link in which you can find the review and can compare yourself that which one is better for you.
https://www.shiksha.com/btech/resources/reviews/reviews-of-nits-in-india
Basically, all are equally good but there are some NITs which are new so you cannot get good infrastructure. But faculty members are good.
Best of luck.

Yes, sure. The eligibility criteria is a minimum of 75% (overall) in class 12th with PCM as a mandatory subject. Make sure you work hard so that you could qualify with very high marks in your respective category, so you will able to get a good college via JEE mains in one attempt.
Best of luck.