Please suggest me some basic books because itsnott possible to go through all the books.
Hello Aspirant,
Ncert ( part 1 and 2).
RC Mukherjee ( physical chemistry)
MS Chauhan ( organic)
Ncert would be sufficient for inorganic part.
For mathematics,
First pick any basic book like RS Agarwal or RD Sharm.
Solve NCERT along with it.
If you get some time, try to solve KC sinha for commanding the calculus part.
In addition to this, solve question bank for each subject.
And join any good test series for Analysis of your preparation.