Lactic Acid, Tartaric Acid and Counting Optical Isomers | Isomerism Part 10 | JEE · NEET

Tartaric acid has two chiral centres, so why only 3 stereoisomers and not 4? 📘 In this part (10 of 14) 1️⃣ Lactic acid: one chiral centre 2️⃣ Tartaric acid: d, l, meso and racemic 3️⃣ Formulas for any number of chiral centres 🧭 Topics in this video • Lactic acid • Tartaric acid and the meso form • Number of optical isomers ✏️ Your turn: How many stereoisomers does HOOC–(CHOH)₃–COOH have? Answer in the comments! 📄 Companion page, formula sheet and practice set: https://layrd.live 📚 Isomerism: all 14 parts (playlist: Isomerism | JEE · NEET | layrd.live) • Part 1: Isomers: Chain, Position and Ring-Chain    • Isomerism Basics: Chain, Position and Ring...   • Part 2: Functional Isomerism    • Functional Isomerism: Every Family You Nee...   • Part 3: Metamerism    • Metamerism: Ethers, Ketones, Amines, Amide...   • Part 4: Tautomerism and Keto-Enol Equilibrium    • Keto-Enol Tautomerism: Enol Content, Mecha...   • Part 5: Other Types of Tautomerism    • Other Tautomerism: Nitro, Oxime, Enamine, ...   • Part 6: Degree of Unsaturation and Counting Isomers    • Degree of Unsaturation and Counting Isomer...   • Part 7: Geometrical (cis-trans) Isomerism    • Geometrical Isomerism: Cis-Trans, Syn-Anti...   • Part 8: Optical Activity, Symmetry and Chirality    • Optical Activity, Chirality and Chiral Cen...   • Part 9: Optical Isomerism Without a Chiral Carbon    • Chiral Without a Chiral Carbon: Allenes, S...   ▶ Part 10: Lactic Acid, Tartaric Acid and Counting Stereoisomers (this video) • Part 11: Racemic Mixtures, Optical Purity and Configuration    • Racemic Mixture, Enantiomeric Excess and W...   • Part 12: Diastereomers, Fischer Projections and D/L Configuration    • Fischer Projections, Diastereomers and D/L...   • Part 13: Conformations of Ethane, Propane and Butane    • Conformations of Ethane and Butane: Newman...   • Part 14: Conformations of Cyclohexane    • Cyclohexane Chair, Boat, Axial and Equator...   ⏱ Chapters 0:00 One centre, two centres, n centres 0:15 Lactic acid 0:54 Tartaric acid and the meso form 2:06 Counting optical isomers 2:46 Worked examples 3:50 JEE question + traps 4:19 Recap 🔔 Subscribe to layrd.live: Layer by Layer. Follow layrd.live 🌐 layrd.live https://layrd.live ▶️ youtube/layrd_live    / @layrd_live   📸 instagram/layrd_live   / layrd_live   #Chemistry #JEE #NEET #OrganicChemistry #layrdlive #STEM