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NCERT Books are widely preferred to prepare for JEE Main.Since the entrance examination is based on the 11th and 12th standard syllabus of CBSE, NCERT books are the perfect reference for studies.Over the past years, it has been noted that the questions of inorganic section from Chemistry have been directly taken from NCERT books.Similarly for Mathematics, many questions available in NCERT books have been repeated in JEE Main question papers . The basic concepts of the mathematics topics have been discussed clearly in NCERT books.NCERT 11th books and Clas12th standard NCERT books can be used to understand the basic concepts of Physics. NCERT books explain all the topics in a more detailed way so that the students understand and perform well in the exam. JEE Main toppers and experts also recommend NCERT for JEE Main preparation. According to experts, studying NCERT is enough to qualify JEE Main. The concepts with the ncert textbooks as well as the previous year question papers will earn you a good score in JEE Mains. For physics and maths ncert won't be enough, you have to workout more and more problems. Chemistry theory part you can get with ncert.