weightage of questions from each section -

Organic - 16

Inorganic- 15

Physical - 14

Let’s begin with the most important section of NEET which carries maximum marks.

Biology:

44 questions were asked from class XI and 46 questions from class XII syllabus. Important topics/chapters include:

Reproduction – 11 questions

Genetics and Evolution – 15 questions

Biology and Human Welfare – 7 questions

Biotechnology – 4 questions

Ecology – 9 questions

Diversity in Living Organisms – 11 questions

Structural Organization in Plants and Animals – 7 questions

Cell Structure and Function – 7 questions

Plant Physiology – 6 questions

Human Physiology – 13 questions

Physics:

The physics section in NEET 2017 paper consisted of 24 questions from class XI syllabus and 21 from class XII. The important chapters covered were:

Mechanics – 19 questions

Thermodynamics and Kinetic Theory – 5 questions

Electrodynamics – 9 questions

Modern physics – 7 questions

Optics and Wave Optics – 5 questions

Chemistry:

21 questions from class XI and 24 from class XII syllabus were asked in Chemistry. The important topics covered were:

Physical Chemistry – 12 questions

Organic Chemistry – 14 questions

Inorganic Chemistry – 12 questions

General Chemistry – 4 questions

I hope you will find it helpful

feel free to ask in the comment box if you are having any further doubt

thanks 

goodluck!