Hello Patil,
For Chemistry just read each chapter at least 5 times from the board book for organic and inorganic as more questions in Chemistry in CET are information based and for physical again practice is the way out.
Work on your weak topics. Solve from JEE MAIN books, problems asked in various state CETs across India. This practice will help.
Give your last day to revise everything and take a good sleep before the day of the exam and make the best out of it in those 3 hours to make your life.
Good luck!
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