hi Anjali,
TO get into IIT you have to clear JEE Advanced which consist of Physics, Chemistry and Maths. I am providing you the link for detailed syllabus below. I already provided link for the syllabus for PCM in your another question. Here it is again:
JEE Advancead syllabus chapter wise
JEE Advanced syllabus topic wise
I hope this answer will help. All the best for the future!!
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