Hi aspirant
The total no of question asked from physics section is 45 that no is fixed . First of all your all concepts should be cleared because question can be asked from every chapter as there is no fixed rule that question will be asked from specific topic which came last year though some question can be repeated .so u should practice sample papers and previous year papers .
https://medicine.careers360.com/articles/neet-question-paper
Here are the sample papers which you can try .
Good luck and hope it helps.

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