Hello Varun

yes, it is really necessary to fill out the college's form as well. You can try out filling different private college's form as in this way you can prepare for the main exams that you are rally concentrated upon. Giving these exams will also boost up your confidence and will let you know you weak points and in this way you can try to improve those points.

filling out different forms also gives us an opportunity to choose our preferred branch in that college.

Hope that helps

All The Best