I'm studying in Aakash institute for one year jee main and advanced tell me that there is any book I need to buy for jee main and advanced or the material given by aakash institute is enough for jee main and advanced preparation and tell me the weightage chapter to score 250+ in jee mains

Hi

Aakash booklets  are good  but they are not good enough to replace books

Some of the top books which you can follow for the preparation of your JEE  examination is provided below:-

PHYSICS

Concepts of physics Vol I and II by HC Verma

Problems in General Physics by I.E Irodov

Objective questions on physics by DC Pandey

Mathematics :

Maths XI and XII by RD Sharma

Complete mathematics for JEE Main TMH

New pattern mathematics for JEE mains/advanced by Arihant publications

CHEMISTRY :-

Ncert Chemistry for class XI and XII

Physical Chemistry by OP Tondon

Numerical Chemistry by P Bahadur

Organic chemistry by OP Tondon

Some of the  important topics or chapters based on their weightage in past year JEE examination is provided below subject wise, you should stress more on these

PHYSICS

Modern Physics -20 marks
Heat and Thermodynamics-12 marks
Optics - 12 marks
Current Electricity- 12 marks
Electrostatics- 12 marks
Magnetics- 8 marks

CHEMISTRY

Transition Elements and Coordination Chemistry- 12 marks
Periodic table and Representative Elements- 12 marks
Thermodynamics And Gaseous State- 8 marks
Atomic Structure- 8 marks
Chemical Bonding - 8 marks
Chemical And Ionic Equilibrium - 8 marks
Solid State And Surface Chemistry - 8 marks
Nuclear Chemistry And Environment - 8 marks

MATHEMATICS

Coordinate Geometry-20 marks
Limits, Continuity and Differentiability-12 marks
Integral Calculus:- 12 marks
Complex numbers and Quadratic Equation :- 8 marks
Matrices and Determinants:- 8 marks
Statistics and Probability:- 8 marks
Three Dimensional Geometry:- 8 marks
Vector Algebra:- 8 marks

You can get chapterwise weightage for all the chapters for each of physics Chemistry and Maths by going through

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

Thank you