Dear Praveen,

Are you asking for NEET exam?

You check the weightage of Chemistry below in NEET exam

Classification of Elements and Periodicity in Properties- 3

Environmental Chemistry- 3

Equilibrium- 4

Hydrogen- 3

Organic Chemistry- Some Basic Principles and Techniques- 3

Some Basic Concepts of Chemistry- 3

Some p-Block Elements- 4

Structure of Atom- 3

Aldehydes, Ketones and Carboxylic Acids- 4

Chemical Kinetics- 3

Coordination Compounds- 4

Electrochemistry- 3

Organic Compounds Containing Nitrogen- 3

p-Block Elements- 3

Polymers- 3

Solid State- 4

To know in detail you can refer below link

https://medicine.careers360.com/articles/neet-exam-analysis

Good Luck!!