Job opportunities MBA (HR) is done after M.Sc (chemistry)
Job opportunities with the combination of these two subjects and skills required for those jobs.
H.R jobs in any pharma or chemical companies can be tried. It is better to gain experience as H.R which will add to your career. After that with that work experience you can try jobs in pharma, biotechnology, chemical, process industries. Skills in M.S office will be added criteria.