No I don't have notes. As for your question whether you should opt for the chemistry or not, it depends on your qualification. If you have studied chemistry upto intermediate level, then chemistry isn't the right choice. Because although chemistry-1 is easy, chemistry-2 is very tough. And most of the curriculum of chemistry-2 is too advanced to be taught in intermediate. BS or MSc (Preferably organic chemistry) should suffice. Unless you are qualified as such, the course is VERY long. Chemistry-2 is huge, requires rote method for a lot of reactions, and concepts very tough to understand. If you were to give 8-12 months just to chemistry 2, then you might be able to get good marks, otherwise, no chance. So don't take it unless you have a background in chemistry.