In the neet exam 2021 conducted by the national testing agency a total of 45% of the questions are asked from the NCERT syllabus directly or indirectly.

I am coming to chemistry almost 50-60% of the questions are asked from the NCERT textbook.

The questions may not be asked directly as given in the textbook but there is a slight change in the the concept through which the questions are asked they may be conceptual or problem solving or or even comprehension type.