how to study for JEE main in one year if i have not done my basics ???

To clear your basics you can focus on NCERT books. It will help you to build strong fundamentals.



To crack JEE Main you should be aware of the exam pattern and syllabus and type of questions come in the exam.



Complete your syllabus first your first priority should be NCERT then you can go for other text books s well.



Below are the recommended books-



PHYSICS



1-Concepts of Physics Vol I and II by H.C. Verma

2-Fundamentals of Physics by Halliday, Resnick & Walker

3- Problems in General Physics by I.E. Irodov



MATHEMATICS



1- Maths XI & XII by R.D. Sharma

2- Plane Trigonometry Part 1 by S.L. Loney

3- Plane Co-ordinate Geometry by S.L. Loney

4- Higher Algebra by Hall and Knight

5- Problems in Calculus of One Variable by I.A. Maron



CHEMISTRY



1- Physical Chemistry by O.P. Tandon

2- Organic Chemistry by Paula Bruice Yurkanis

3- Organic Chemistry by O.P. Tandon

4- Inorganic Chemistry- Chemistry XI & XII by NCERT



Focus on important topics more as per the weightage in the exam. You can solve MCQs related to important chapters. so, that you have good hold on that topic.



You can refer to past year problems to understand the level of questions asked in the exam and you can also solve complete test series to check your performance level time to time.