Hello

If your query is about NEET 2020 exam, chemistry section in the exam consist of 45 questions. Chapter wise weightage of topics from class 11 and 12 are as follows:

Basic Concepts of Chemistry- 1%
Structure of Atom- 2%
Classification of Elements and Periodicity in Properties- 2%
Chemical Bonding and Molecular Structure- 5%
States of Matter: Gases and Liquids- 2%
Thermodynamics- 8%
Equilibrium- 6%
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%

All the Best!