Each subject is very crucial for ensuring that you make it to the IITs. Every student must pass in five subjects for the qualification purpose. These are-PhysicsChemistryMathematicsA language paperAny subject other than the above fourStudents must give equal time and weightage to each subject, and weak subjects must be given even more time because at the end of the day, if a student performs well in every subject, except one, he or she may not qualify for the IITs.