This note is prepared strictly based on NCERT. There may be or may not be some extra topics or concepts be covered but it is tried level best to cover all topics in a simple and convenient language. This note is very useful for beginners as well as for advanced learners as it has been tried to prepare the note in such a manner. It is also suitable in the time of revision. The concepts are covered with few questions as it aims basically in covering the concepts. For any mistake , suggestion or query just provide your feedback and in upcoming notes it will be concerned and also it will be tried to make these notes more affordable even though it is also at affordable amount. Your feedbacks are highly appreciated.