Wow! Congratulations! Your scores are really impressive. No, adding a Chemistry test is not necessary. But, if you really want to prove your merit in every science, you might want to take the Chemistry test. A third test for someone as smart as you should not be a challenge. And no university is going to object to seeing your ability in all the sciences. I am assuming you are interested in the engineering field. Most schools generally require only 2 SAT subject tests and the number of schools requiring the subject test is also decreasing. Check the entry requirements of the school and the course you are applying to. Are you doing CBSE/ISC/IB? That could also make a difference to your decision.Reach out if you need more advice!
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