IF STILL YOUR PREPARATION OF PHYSICS AND CHEMISTRY YOU UNDERSTAND IS INCOMPLETE THEN STUDY THIS E-BOOK OF NCERT/CBSE SOLUTION, AND STUDY ALL THE LESSONS ONE BY ONE AND GIVE A FINAL TOUCH TO ACHIEVE A TARGET OF HUNDRED PERCENT MARKS IN SCIENCE. STUDYING NCERT SOLUTION YOU WILL REACH TO DEPTH OF KNOWLEDGE AND GET INTELLIGENCE INPUTS WHICH IS REQUIRED TO SOLVE SA -2 CBSE BOARD PAPERS AFTER STUDYING THIS BOOK PLEASE DON'T FORGET TO MAKE REVIEW.