Is it really tough for a student to concentrate in IIT JEE entrance if he is doing his ICS board in XI and XII.

Hi, It is not the toughness but it is about the similarity in both syllabus. ICS board hav less similarity but CBSE board has abt 70 to 80% similarity. It is not really tough for ICS as board doesn't matter so much as in JEE exam more focus is given on concept rather on memorising the things & people from all board crack the JEE but, it is a bit easy for CBSE student to score in Board exams while preparing for JEE.