Hi Biky,
I can provide you 2016, 2017 and 2018 cutoff ranks of IIT Kharagpur for a 5-year Integrated M.Sc course in Chemistry.
These Opening Ranks (OR) and Closing Ranks (CR) were for SC category, so you can get a clear idea.
In 2016, after the last round-
OR- 1,892 and CR- 2,097
In 2017, after the last round-
OR- 1,811 and CR- 2,197
In 2018, after the last round-
OR- 2,128 and CR- 2,258
Hope this helps you.
All the best!!!
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