Dear student,

It all depends upon the highest marks secured in chemistry subject in all India.
Suppose that, if you have secured 90 marks in chemistry and 90 is the highest marks all over in India, then you will score 100 percentile in Chemistry subject.

Basically if you want to get 100 percentile score in chemistry subject then you must try to score above 90 marks in chemistry .

And for that your chemistry must be very good, in all three branches i.e, physical chemistry, inorganic chemistry and organic chemistry.

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