hello subha......

the important lessons foe the neet exam in chemistry are

equilibrium

redox reactions

chemical bonding and molecular structure

organic chemistry

coordination compounds

p block elements

alcohols,phenols and ethers

aldehydes,ketones and carboxylic acids

atomic structure

surface chemistry

i hope this this information is helpful

all the best.

Hello Shubha,

The most important topics for NEET chemistry are: Aldehydes, Ketones And Carboxylic Acids, Bio molecules, Chemical Bonding And Molecular Structure, Chemical Kinetics, Coordination Compounds, Equilibrium, Organic Chemistry - Some Basic Principles And Techniques, p-block Elements, Redox Reactions, Thermodynamics

Make sure you are well versed with these. And keep working on previous years questions. 

All the best.