Getting success in the national level competitive exam like IIT JEE is a difficult task. Lakhs of students dream about getting engineering degree from Top IIT. Cracking JEE Mains and JEE Advanced is not possible in few days or months, it requires continuous efforts through two long years. If a student is focussed and doing the studies regularly, revising the concept on daily basis and solving questions on each topic will definitely going to get success in first attempt.
Studying hours does not have a hard and fast rules, few students study for 2 hours, few 4 hours. Important thing a student has to remember whenever you are studying, you should be completely into it. While studying chemistry topic, concentrate completely on that [particular topic of chemistry, do not think about maths or physics during that time. Revision after the study is very important, keep 1 to 2 hours for solving questions which you have studied. So 4 to 5 hours study starting form 11th class will be helpful for JEE.
As the exam date approaches, say 6 months from the JEE Mains, the study hours need to be increased to 8 hours. Give more focus on revision and solving last year’s JEE Mains and Advanced question papers.