Hi shaifali

As per my knowledge, yes, it is compulsory to have mathematics as an essential subjects in 10+2 level for IIT Chemistry.
But here i have mentioned some IITs accepting JAM scores and their eligibility criteria.
For M.sc : Candidate must have Bachelors degree (Geology) and any two subjects among Chemistry, Mathematics, and Biological Science Physics. Also, the candidate must have passed 12th with Math as a mandatory subject.
For M.sc in IITB: Candidate must have passed graduation with both Mathematics and Physics for two years and at least one out of these two for three years.
For M.sc biotechnology in IITB and IITR: Candidates must have done graduation degree in any of these (Science, Agriculture, Pharmacy, Veterinary, Engineering, and Medicine) branches.
For M.sc chemistry in IITB, IITD, IITK, IITM: Candidate must have done a graduate degree in chemistry and also candidate must have passed 12th with mathematics.

Good luck

No,That's Not really Not Important But,Yeah U Must have Chemistry as A subject In Intermediate and Graduayion Level. For IIT,JAM....MSC Program.