Is ncert enough for iit preparation?

Questions asked in JEE Advanced are conceptual based which you can not practice by only reffering NCERT book.

To score good marks in JEE Advanced it is very important to practice problems.

You can also refer previous year papers to understand the exam pattern and level of the questions.

You can check below recommended books for your preparation

Physics

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

Fundamentals of Physics by Halliday, Resnick & Walker

Problems in General Physics by I.E. Irodov

Mathematics

Maths XI & XII by R.D. Sharma

Plane Trigonometry Part 1 by S.L. Loney

Plane Co-ordinate Geometry by S.L. Loney

Higher Algebra by Hall and Knight

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

Chemistry

O.P. Tandon publication

All the Best!!