Outstanding features of the book• Detailed study : practice exercises, suggested projects/activities, seminars, group discussions, field trips, etc.• NCERT FILE solved at the end of each chapter; in text questions, exercise questions and exemplar problems.• COMPETITION FILE includes exemplar MCQs and previous years' NTSE (SAT) questions with answers.• A number of HOTS questions with answers given in each chapter enhance thinking capacity of young scholars.• Specially designed questions (solved as well as unsolved) covering all types of questions; very short answer type, short answer type, long answer type and multiple choice questions.• Answers and Hints to selective questions of all types is a significant feature of the book.Students as well as teachers would find the book to be a valuable and self contained resource, one that lightens their workload and gives them all the support they need to achieve excellence.