Generally, the chapters included in class 11 chemistry syllabus are-

• S ome Basic Concepts of Chemistry
• Structure of Atom
• Classification of Elements and Periodicity in Properties
• Chemical Bonding and Molecular Structure
• States of Matter
• Thermodynamics
• Equilibrium
• Redox Reactions
• Hydrogen
• The s-Block Elements
• The p-Block Elements
• Organic Chemistry – Some Basic Principles & Techniques
• Hydrocarbons
• Environmental Chemistry

Among all these chapters, the organic part is interrelated. You should always start with the easy one i.e. Some basic Concepts of Chemistry. Environmental Chemistry is also an easy chapter. Thermodynamics, Chemical bonding and Molecular Structure, Structure of Atom etc are important chapters and carry more weightage.