Hello Suman,

To get a seat in NITs,IIITs,GFTIs ,you need to have secured a minimum 75% marks in class XII or equivalent exam or be in the top 20 percentile in their class XII exam conducted by the respective board. For SC/ ST candidates, the eligibility criteria are to secure 65% marks in class XII or equivalent exam.For more details,go through https://www.google.com/search?client=ms-android-xiaomi&ei=T8vTXLjJKoT_rQGRqa6AAg&q=educational+qualification+for+nit&oq=educational+qualification+for+nit&gs_l=mobile-gws-wiz-serp.3..0i22i30l3j33i22i29i30l5.3341.11356..11906...1.0..0.473.7604.0j4j28j0j1......0....1.......8..0i71j35i39j0i131j0j46i131j0i67j46i67j0i131i67j0i20i263j46.IJAzhfNFNEQ 

• Some of the top government colleges accepting JEE mains are 
• Delhi Technological University, Delhi. 
• National Institute of Technology Tiruchirappalli. 
• National Institute of Technology Warangal.
• Motilal Nehru National Institute of Technology Allahabad. 
• National Institute of Technology Karnataka Surathkal. 
• Jadavpur University, Kolkata. 
• Jamia Millia Islamia, New Delhi.

For more details about fee structure and etc go through https://engineering.careers360.com/colleges/list-of-government-engineering-colleges-in-india-accepting-jee-main

As JEE Mains has introduced EWS category ,we can't predict your chances as sometimes they may go wrong,so we suggest you to wait till the final allotment results.

Best of luck!!