but only worked out examples????

It is good to clear your basics. It is good for practice but if you want to crack your exam you should recommended other books as well. NCERT should be your priority

You can check below recommended books as well-

Physics
HC Verma – Concepts of Physics (Part I)
HC Verma – Concepts of Physics (Part II)
IIT JEE Physics – DC Pandey
Problems in General Physics – I.E. Irodov
Physics for IIT-JEE – Resnick, Halliday, Walker.
Problems in Physics – S.S. Krotov

Chemistry
Organic Chemistry – Morrison Boyd
Organic Chemistry – O.P Tandon.
Modern Approach to Chemical Calculations – R.C. Mukherjee
Numerical Chemistry – P. Bahadur
Concise Inorganic Chemistry – J.D. Lee

Mathematics
IIT Mathematics – M.L. Khanna
Differential Calculus – A Das Gupta
Class XI & XII Mathematics – R.D. Sharma.
Trigonometry, Geometry Books – S.L. Loney.
Problems in Calculus of One Variable – I.A. Maron
Higher Algebra- Hall and Knight