SALIENT FEATURES OF THIS BOOK This book is written strictly according to new syllabus prescribed by the Council for ISC examinations (Class XI). The Subject material has been treated systematically and presented in a coherent and interesting manner. The theory has been explained in simple language and includes many examples from real life situations. Emphasis has been laid on basic facts, concepts, terms, principles and on the applications of various concepts. Carefully selected examples consist of detailed step-by-step solution. A number of solved examples are included in each section so that students are well prepared to tackle all the problems given in exercises. Many chapters contain Illustrative Exampled for Multiple Choice Questions followed by Multiple Choice Questions. These MCQ’s may be useful to students attempting competitive exams like IIT JEE. Each chapter is followed by a Chapter Test which includes problems related to all the topics, so that students have total understanding of these topics before going on to next chapter. An attempt has been made to make the book user friendly¾matter is well spaced out and given in a bigger type size. Also, the manner has been broken into sections and subsections so that students can learn at their own pace. The book contains a large number of very short answer type questions. This book is sufficient to help the students score cent-percent marks is ISC examination and also builds a strong foundation for success in any competitive examination.