19.9 Isomerism | Complete Lecture | Optical & Cis Trans Isomerism | Organic Chemistry |

Complete 50-minute lecture on Isomerism from Chapter 19 of the Class 12 Chemistry New Book 2026. In this lecture, we cover the major concepts of isomerism in a systematic way: • Isomerism and its classification • Constitutional Isomerism • Functional Group Isomerism • Tautomerism • Metamerism • Other types of Constitutional Isomerism • Stereoisomerism • Conformational Isomerism • Configurational Isomerism • Enantiomers • Diastereomers • Racemic Mixture • Meso Forms • Geometrical Isomerism • Cis and Trans Isomerism This lecture is designed for Class 12 Chemistry students, Punjab/Lahore Board and other Pakistani boards, and students preparing for MDCAT 2026. 📚 Chapter 19: Basics of Organic Chemistry 🎓 Class 12 Chemistry | New Book 2026 📖 PECTA New Syllabus 2026 #Isomerism #Class12Chemistry #ChemistryChapter19 #OrganicChemistry #ConstitutionalIsomerism #Stereoisomerism #Enantiomers #Diastereomers #MesoCompound #RacemicMixture #GeometricalIsomerism #CisTransIsomerism #PunjabBoard #LahoreBoard #MDCAT2026 #ChemistryWithAAK #ChiralCentres #opticalisomerism #Planoepolarizedlight #