I would suggest you to go through the NCERT first as these would be helping you to make all your basics strong and clear, after all this you can refer O. P. Tondon,Numerical Chemistry by P. Bahadur, Organic, Chemistry by Paula Bruice Yurkanis, Inorganic Chemistry by J.D. Lee, Organic Chemistry by Morrison & Boyd.

Apart from this, you can follow below provided preparation tips -

1. Know the syllabus very well.
2. Read standard books only as there are many books available in the market so it is advisable to use the books which make all your concepts clear and which are easy to understand.
3. Understand the weightage of topics properly.
4. Proper Revision plan should be followed.
5. Mock Tests and Practice Tests should be done as this will help you to learn time management skills and this will also make you familiar with the exam pattern.

Hope this helps!!!