Preparing for a government exam parallel with M.Sc Chemistry, is a bit tough. Here are some reasons as to why it could become difficult.

• You will have 4 days of lab class including physical, organic, inorganic and analytical lab.
• You will have assignments to write, records to be completed, and seminars you need to attend and prepare for.
• You will have to prepare for C-1 and C-2 internals.
• Try maintaining a proper schedule, plan your activities beforehand.
• If your classes become strict you will hardly get enough time to study during the day. But make time either early morning or late at night.
• Make a to-do list as you are preparing for competitive exams. 
• Make daily, weekly, monthly and yearly goals and stick to them.
• If you are traveling try to use the time effectively by reading inorganic theory concepts or try solving previous year’s government exam questions.
• Usually in chemistry most of the organic and inorganic are heat-related experiments.

If you have free time, utilize it by visiting the library and reading books on inorganic chemistry. You could also complete your assignments to stay a bit ahead.

You will be left with 4-5 hours because of your M.Sc. but it is still sufficient, as you can study effectively between these hours. Make short notes and focus one day on revision, do mock tests to analyze your strengths and weaknesses and work on them.