Dear Student,

First of all your syllabus for chemistry includes , Thermodynamics, Chemical Reactions, Basic Concepts of Chemistry, Periodic Classification of Elements, Carbon compounds, Acids, Bases and Salts, States of Matter: Gases and Liquids, Classification of Elements & Periodicity in Properties, Metals and Non-Metals, Environmental Chemistry, Solid State, Electrochemistry, Chemical Kinetics, Isolation of Elements, Surface Chemistry, Chemical Bonding, Chemistry of Noble Gases, Structure & Bonding, Alkenes, Cycloalkenes, Dienes and Alkynes .

The best way to prepare for this section is to solve the previous year papers of KVPY.  Solve as many papers as you can . You can also refer to some good books like NCERT Chemistry, Chemistry by OP Tondon, Pardeep's Chemistry etc. This is enough for your preparation.

Hope this helps.