M.Sc.

Kindly visit this link:
https://www.shiksha.com/medicine-health-sciences/paramedical/course/m-sc-in-perfusion-technology-sri-ramachandra-institute-of-higher-education-and-research-porur-chennai-334385

No, you can't take the admission in M.Sc. Firstly, you have to clear your back.

Maybe you got the admission. It all depends on the college management so you have to ask for that to the college faculty.

No, I am afraid as the eligibility for M.Sc chemistry is that you must have completed BSc chemistry, therefore chemistry has to be your main subject, not an allied one.

Kindly visit this link:
https://www.shiksha.com/science/course/m-sc-in-food-science-and-technology-school-of-biotechnology-and-bioinformatics-d-y-patil-university-navi-mumbai-124913

As per the information available on the internet, you need to study majorly about Part A-Chemistry, PART B-Biochemistry, Biotechnology, Microbiology and Physics Environmental Science. The question comes from the syllabus of what most of the topics one has studied in his graduation.

There are only 9 colleges in Pune that offer M.Sc microbiology:
https://www.shiksha.com/science/colleges/m-sc-microbiology-colleges-Pune

SHUATS provides good placements to the M.Sc. in forensic science students. Students are placed in big companies like Aditya Birla Group ,Ansal API , BASF India ,Bayer CropSciences , Chemical Fertilisers ,CordLife , ERA , Escorts , Force Motors ,HCC , HCL , iGate , Infosys , ITC Ltd. , Jain irrigation ,John Deere , Kribhco , Larsen and Toubro , Mahindra Group , MotherDairy , Mphasis , NCML ,Nestle, Parle Agro ,Ramky Group , Reliance Retail , Sab Miller ,sonalika , ThoughtWorks ,Thyrocare , VNR Seeds , Vodafone and Wipro.

It's not a bad option at all. You can do M.Sc in chemistry from correspondence at ANU. This university is UGC approved, having NAAC accreditation (Grade 'A'). So, it's good to do M.Sc. chemistry in correspondence from this university.

You may check the syllabus here:
https://www.shiksha.com/science/course/m-sc-in-forensic-science-gujarat-university-navrangpura-ahmedabad-120862