If you have finished the physics, biology, and 5 chapter from chemistry portions of your entire syllabus, you may take an exam covering the entire course. Your concept quality will improve if you answer the questions from there. Giving a thorough mock exam allows you to assess your strengths and areas of your syllabus that require additional time.

further you also do the same for your NEET mock test and for the good marks you can also does previous year questions. It will going to help you for your excellent preparation. Remember one thing "practice makes a man perfect"

Just believe in yourself! You definitely got AIIMS, Delhi

All the very best.