Plus One(XI) Chemistry Class Notes(Text Based) All in One PDF Please click on the links below to download Class 11 Chemistry study materials. As you know more and more Chemistry will become simpler and simpler. The notes are divided into chapters, which makes them easy for handling. So they are very useful for both Kerala Syllabus and CBSE students. These study notes are the result of 20 years teaching experience and completely based on the NCERT syllabus.