This lecture covers the essential concepts of molecular chirality and its significance in organic chemistry. It begins with an introduction to the Cahn-Ingold-Prelog rules for determining the priority of substituents around chiral centers. The instructor explains the importance of chirality in biological systems and how it affects the properties of molecules. The discussion includes diastereomers and enantiomers, highlighting their differences and relevance in chemical reactions. The lecture also delves into the nomenclature of Fischer projections and the representation of chiral molecules. The instructor emphasizes the role of chirality in everyday compounds, such as sugars and amino acids, and discusses the implications of chirality in pharmaceuticals. The session concludes with examples of chiral molecules and their applications, reinforcing the importance of understanding chirality in the study of organic chemistry.