Hello,

NCERT specially for chemistry is a must do for any competitive exam like NEET, you should be very well versed with the NCERT before going any level higher, NCERT books are the best study materials for NEET 2021 preparations. And since NEET syllabus 2021 is based on the NCERT syllabus of Class 11 and 12 with Physics, Chemistry and Biology as the main topics covered.

NTA conducts NEET in offline mode which means the question papers are not released and so it is difficult to check which questions have been asked from which book. But in general 98% of the questions in NEET come from NCERT books alone .

Hope this helps,

All the best !