Hello abhilash

There are different entrance exams for Msc chemistry, you need to provide exact information about the examination you want to appear.although I'm providing dates for some of the general entrance examinations-

1. DUET ( DELHI UNIVERSITY) - June 2021
2. OUCET - July 2021
3. BHU PET - may 2021
4. BITSAT - may 2021.

If you want to know about specific entrance examination you can ask in comment section

I hope it helps

Best of luck