M.Sc

Applied chemistry is used to know how chemistry is used in industry, society, environment, nanotechnology, polymer, etc. It's relevant to the industrial chemical which deals with the applications of chemical used in industries.

ME and M.Tech are post graduate degrees in Engineering such as M.Tech/MS in Civil, Electronics, Electrical, Mechanical etc. Whereas, M.Sc is post graduate degrees in Science such as M.Sc Physics, Chemistry, Maths, Botonyt.

After B.Sc, if you choose to do B.Ed, you can only apply for primary class teacher job in govt. schools as TGT. For post-graduate trained (PGT) teachers, you should have both M.Sc and B.Ed degree. If you have a genuine interest in teaching then do M.Sc and after that B.Ed. If you want to do a job in private sector companies, go for MBA.
Good luck.