If I secure 75 percent after giving improvement will that criteria will be fine to get iit also my rank gen is 557

Hello Aspirant,
Scoring 75% in CBSE board is the minimum required marks for being eligible for the admission in any nits or iits.
So if you score 75%, then definitely you can get iit.
Your mentioned rank is very very good.
If you have any other queries, please do comment here.

Good luck...!!!

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Hello there!!! For admission in IITs it is required that a candidate must score atleast 75 percentage in 12th boards or equivalent exam. So yes if you attain 75 percentage then you are eligible for admission to IITs. Then the admission will be done on the basis of jee Advance rank. To know which college you can get based on your rank you can use our college predictor using the following link: https://engineering.careers360.com/jee-advanced-college-predictor