Hi Sachin,

There are two semesters for preparatory courses in IIT Madras or any other IITs,

In first semester, you will have four theory papers, Physics-1, Chemistry-1, Mathematics-1 and English-1. You will be having two practical subjects called Physics Lab-1 and Chemistry Lab-1.

In Second semester, you will again have four theory papers, Physics-2, Chemistry-2, Mathematics-2 and English-2. You will be having two practical subjects called Physics Lab-2 and Chemistry Lab-2.