Hi Dhananjay

Some good books for CBSE are:

• NCERT course book
• NCERT Exemplar
• Pradeep's New Course Chemistry

Books for competitive exams:

• P Bahadur- Numerical Chemistry
• OP Tandon- Organic Chemistry

For more information on books for competitive exams, refer the following link ;

https://engineering.careers360.com/articles/best-books-for-jee-main

Dhananjay, for now we would say stick to NCERT. This is because due to the lockdown, the academic year has been lesser than the rest of the years so far. So the chances of the syllabus being reduced are highly likely. So instead of hurrying to buy books, it is wise to wait to until the Academic year starts because the MHRD is discussing about reducing the syllabus. Until then you can read from NCERT and build strong basics.