This books is very helpful to the boards giving students l feel proud to present the revised edition of this well- acclaimed book, This book has a large number of questions from the Ncert textbook and previous year CBSE board paper with full explanatory solutions.A large number of MCQS on all topics have also been included.A separate excercise for very -short Answer and Short -Answer questions has also been given at the end of each chapter,to provide extra questions for ample practice.