if you have studied both physical science and chemistry then you will be able to get admissions in masters program from any one of the chosen sunject .somnetimes for several exams 2 years of study of a particular subject ar recquired while in some 3 years beased on the college. you can even fill the form for iit jam chemstry however but not for phe 

kindly go through the required criterias of the colleges you are intersted in 

best wishes