You can download NEET question papers HERE.
It is an educational website where you can download previous year question papers for important examinations. NEET examination question papers of the year 2018, 2017, 2016 are also uploaded in it.
some faq is given below which are generally asked regarding neet exam: -

Ques 1: Who sets NEET Exam Question Papers?

Ans: Professors of different colleges are asked to set 1 to 3 questions so that they cannot leak the NEET paper to anyone. NTA collects those questions via fax and once questions are received, these are proof read by NTA paper setters.

Ques 2: Can you predict this yearís NEET questions?
Ans: Everybody has their own prediction level. Also, everyone makes their own calculative guesses.
You feel confident when you complete the syllabus and revise it thoroughly. Paying attention to the important topics is crucial but donít trust the predicted topics and questions blindly.

Ques 3: Is it true that NEET Papers Leak happens every year?
Ans: No, this isnít true at all.
The papers have never been leaked, and with all the measures taken after 2016, it is unlikely to happen in future also.