NIT

Saurabh ! based on your score in JEE mains you will not get admission in top Government institutes but don't worry there are some private institutions that are doing equally good as them,you may get admission in them by scoring a good rank in their entrance examination and thereafter getting high scholarship.some of these universities are:
1.BITS
2.Lovely Professional University
3.Symbiosis
Along with good education,these also provides good platform to boost their skills .These universities provides assured placements along with high standards of education.

If you belong to ST or SC category, you have a great chance of getting a NIT.

Hey Abijayan,
You are having very good marks in your board exams but not a good score in JEE Mains. You may get NIT based on this score or may not also. You shouldn't rely only on this and apply for some other best institutes also. Private universities also provide quality education with best infrastructure along with impressive placements. Check out the following colleges -

NITs have very low cut-offs regarding class 12th marks. For eg, NIT-Durgapur demands around 50 percent. But please check the latest rule.

It depends on category. It will be too soon to say anything.

You can easily get an NIT.
Best of luck.

If you belong to ST or SC category, then you will surely get an NIT during counselling. If you belong to OBC category then you may or may not get an NIT. General category cannot get into NITs with this score.

Your mains score is low, even with your reservation it will be difficult for you to secure a seat for mechanical engineering. You can look at alternate branches like ICE and Production