Is it impossible for a student to qualify JEE ADVANCE without any coaching

Formulate the right plan and execute it correctly. Be thorough with  your concepts and remain focussed. Practice past years question papers and take mock tests as it will help you to identify your strength and weak areas.

Work on those areas and I am sure you would be successful in cracking the exam. Make sure that you follow a time table.

if you are determined ,you can but it is not sure that you will get a good rank

It's really tough.....