IS NCERT SUFFICIENT?

Jinhone bhi NCERT padha hai and then JEE ke mocks diye hai, kya bata skte ho ki sirf NCERT level tak bhi Chemistry and physics karunga to Mains ke Questions ho jayenge? Matlab NCERT ke bahar se to nhi pooch lenge?
(Ik i am very choomtiya for asking this but please help me, i have already destroyed my 3 years including drop).