First of all, it would better to complete your NCERT books properly as 75-80% questions come from there. Once you are done with this, you can refer these books as well - Physics Concepts of Physics 1 & 2 - HC Verma Physics Mechanics 1 - DC Pandey Physics Mechanics 2 - DC Pandey Problems in General Physics - Irodov 38 Years' Chapterwise Topicwise Solved Papers (2016-1979).

Chemistry- Modern Approach to Chemical Calculations - R.C. Mukerjee Concepts of Physical Chemistry for JEE Paperback – 2014 by P. Bahadur (Author) Organic Chemistry, 7e Morrison Boyd 38 Years' Chapterwise Topicwise Solved Papers (2016-1979) IIT JEE Chemistry. Maths - Mathematics Vol. I & II - R.D.Sharma Problems Plus In IIT Mathematics A.Das Gupta Objective Mathematics - S.K.Pundir M.L.Khanna 38 Years' Chapterwise Topicwise Solved Papers (2016-1979) IIT JEE Mathematics Also, there are many books available in the market so better to choose the standard books which are easy to understand and which makes all your concepts strong. Good Luck!!!