Hello Aspirant.

No, you're not eligible to get enrolled in any NIT or IIITs through JEE main examination as you don't fulfill their eligibility criteria of scoring atleast 75% aggregate in class 12th.

According to JEE main norms a candidate is eligible to get a college only if he get atleast 75% in 12 for general and 65% for obc/sc/st.

Best of luck

Dear aspirant,

Yes, it is mandatory, not only for IITs but for every government institute/university/college like NITs, DTU, NSIT, etc., it is mandatory to score 75% in class 12th to be eligible for NITs and IIITs.

Thank you.