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!!