Hey Lakshmi

To get admissions into Master of Science in Chemistry, most of the universities and colleges take admissions through IIT-JAM (Joint Admission Test for MSc). It is conducted every year by Indian Institute of Technology. It is an online 3 hours long exam and it's application is out every year in the month September. Through IIT JAM you can get admission into Masters program in various IITs' and NITs'. For more details regarding IIT JAM, follow; IIT JAM

You can also apply for M.Sc (Chemistry) in Delhi University, which is also done on the basis of entrance test, Delhi University Entrance Examination (DUET). It is also an online exam whose notification is out every year in the month of August. For more details, follow the link; DU PG