I did 12th in 2016 and took admission in a private college for engg. in 2017. Can I change my college as I have got 31k rank in Mains 2018?

Hi, With 31 k rank in general category you can't expect a good college. Even if you get a good college, you may not get your desired branch. I will say you to leave JEE rank and focus on study in which college you are currently study. You have already wasted 2 year for JEE. Don't waste three. You a

Yes, you can change your college by simply applying for your admission withdrawal with a suitable reason. Moreover, do this as soon as possible, as many colleges intentionally delay such processes.