Hi Ruthvik,

As per you mentioned score details of 12th board, JEE Mains so you are eligible for B.teh course in IIT. The basic eligibility for the IIT is :

A candidate should passed 10+2 from recognised institute or equivalent  with minimum score of 75% marks. For SC, ST, PWD candidate having 10% relaxation as they need aggregate mininmum score of 65%  or minimum CGPA of 6.0 and 5.5 for SC, ST respectively.

All the best !!