Isn't there any way I may be eligible for IIT,AIEEE,etc. next year? I am sure I would not get more than 50% in the 12th Board exams this yr.

I have just given my 12th Board exams for the first time this year, but I am quite sure of getting poor results. Still I am confident enough that I can crack some of the tough engineering exams next year, if given chance. Is there any way I may be eligible for exams like IIT, AIEEE ,etc. next year?