Hi

When it comes to weightage of class 11 and 12th i. e the number of questions in neet examination from class 11 and 12th, then it is almost equal to 50 -50 % , there has not been much difference in the number of questions asked in NEET from class 11th and class 12th over the past years.

For instance,

The analysis of question paper of Neet 2020 and Neet 2019 is provided below

NEET 2020 phase 1 analysis :-

. .PHYSICS

• Class 11 :- 18 questions

• Class 12 :-27 questions

• Total :- 45 questions

. .CHEMISTRY

• Class 11 :-21 questions

  Recommended

• Class 12 :- 24 questions

• Total :- 45 questions

. . BIOLOGY

• Class 11 :-50 questions

• Class 12 :-40 questions

• Total :- 90 questions

So , out of the total 180 questions 89 questions were from class 11 and 91 questions were from class 12.

NEET 2019 analysis

.        .PHYSICS

• Class 11 :- 22 questions

• Class 12 :-23 questions

• Total :- 45 questions

. .CHEMISTRY

• Class 11 :-23 questions

• Class 12 :- 22 questions

• Total :- 45 questions

. . BIOLOGY

• Class 11 :-46 questions

• Class 12 :-44 questions

• Total :- 90 questions

So, out of the total 180 questions 91 questions were from class 11 and 89 questions were from class 12 in neet 2019

As you are interested in weightage or marks distribution, I would like to help you further so I have provided you below the expected chapterwise weightage for your need 2021 based on previous year question papers of Neet examination over the years.

.PHYSICS

*Physical-world and measurement:- 2%

*Kinematics:- 3%

* Laws of Motion :- 3 %

* Work, Energy and Power :- 4 %

* System of Particles and Rotational Motion :- 5 %

* Work, Energy and Power :- 4 %

* Gravitation :- 2 %

* Properties of Bulk Matter :-3 %

* Thermodynamics :- 9 %

* Behaviour of Perfect Gas and Kinetic Theory :- 3 %

* Oscillation & Waves :- 3 %

* Electrostatics :- %

* Current Electricity :- 8 %

* Magnetic Effect of Current & Magnetism :- 5 %

* Electromagnetic Induction & Alternating Current :- 8 %

* Electromagnetic Waves :- 5 %

* Dual Nature of Matter and Radiation :- 6%

* Atoms & Nuclei :- 3 %

* Optics :- 10 %

* Semiconductor Electronics :- 9 %

. .CHEMISTRY

* Basic Concepts of Chemistry :- 1 %

* Structure of Atom :- 2 %

* Classification of Elements & Periodicity in Properties :- 2%

* Chemical Bonding and Molecular Structure :- 5 %

* States of Matter: Gases and Liquids :- 2 %

* Equilibrium :-6 %

* Thermodynamics :- 8 %

* Redox Reactions :- 3 %

* s-Block Elements :- 2 %

* Some p-Block Elements :- 2 %

* Organic Chemistry: Basic Principles & Techniques :- 4 %

* Hydrocarbons :- 3 %

* Environmental Chemistry :- 2 %

* Solid State :- 2 %

* Solutions :- 5 %

* Electrochemistry :- 2 %

* Chemical Kinetics :- 3 %

* Surface Chemistry :- 2 %

* Isolation of Elements :- 2 %

* p-Block Elements :- 5 %

* d- and f-Block Elements :- 4 %

* Coordination Compounds :- 9 %

* Haloalkanes and Haloarenes :- 3 %

* Alcohols, Phenols and Ethers :- 4 %

* Aldehydes, Ketones and Carboxylic Acids :- 4 %

* Organic Compounds containing Nitrogen :- 2 %

* Biomolecules :- 3 %

* Polymers :- 3 %

* Chemistry in Everyday Life :- 2 %

. .BIOLOGY

* Diversity of Living Organisms :- 14%

* Structural Organisation in Plants & Animals :- 5 %

* Cell: Structure and Function :- 9 %

* Plant Physiology :- 6 %

* Human Physiology :- 20 %

* Reproduction :- 9 %

* Genetics and Evolution :- 18 %

* Biology and Human Welfare :- 9 %

* Biotechnology and its Applications :-4%

* Ecology and Environment :- 6 %

You can get detailed information regarding chapter wise weightage of all the chapters for each of physics, chemistry and Biology for neet by going through our page for which link is provided below

https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics/amp

This chapterwise weightage will help you a lot lot in planning your studies for Neet examination, you can comparatively focus more on chapters having higher weightage.

Thank you