Hello,

Hope you are doing well.

There is no such thing like free seat.To take admission in a college you have to qualify for that college and then you get a seat.On the basis of your rank obtained there can be several colleges you can get admission.Every colleges have different eligibility criteria for the admission procedure.So to know about the colleges you are eligible and  can get a seat you can use Career360 college predictor tool which will help you to predict the colleges on the basis of your rank obtained.You can predict the colleges and take admission in the desired branch accordingly.

Here is the link of Career360 College predictor tool:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this will help you!

All the best for your bright future!