Use of Chlorine in Water PurificationLecture 9 | Chapter 13 | FSc 1st Year Chemistry

Use of Chlorine in Water Purification Lecture 9 | Chapter 13 | FSc 1st Year Chemistry In this lecture, we explain the use of chlorine in water purification in a clear, conceptual, and exam-oriented way according to the Punjab Textbook Board / PECTAA syllabus. Chlorine plays a vital role in making drinking water safe and germ-free. In this video, students will learn how chlorine kills bacteria, why HOCl (hypochlorous acid) is more effective than OCl⁻, and how pH affects disinfection power. All reactions are explained step-by-step for board exams, MCQs, short questions, and conceptual understanding. 🔬 What You Will Learn in This Lecture ✔ Why chlorine is used in water purification ✔ Chemical reactions of chlorine with water ✔ Formation and role of hypochlorous acid (HOCl) ✔ Effect of pH on disinfecting action of chlorine ✔ Difference between chlorination and disinfection ✔ Advantages of chlorine over other disinfectants ✔ Board-exam focused points & short-answer tips This lecture is highly useful for FSC 1st year students, competitive exams, and conceptual clarity. It is taught in a simple, logical, and teacher-friendly style, making it easy to remember and reproduce in exams. 📌 Recommended for: FSc 1st Year Chemistry students | Board Exam Preparation | Conceptual Chemistry Your Searches: Use of chlorine in water purification chlorination of water hypochlorous acid HOCl disinfection of water chemistry FSc 1st year chemistry chapter 13 halogens water treatment chlorine chemistry lecture Punjab board chemistry chlorination hypochlorous acid HOCl chemistry water disinfection chlorine reactions halogens FSC 1st year chemistry Punjab board chemistry PECTAA chemistry chemistry lecture board exam chemistry drinking water purification #Chlorine #WaterPurification #Chlorination #HypochlorousAcid #FSc1stYear #Chapter13Chemistry #Halogens #PunjabBoard #PECTAA #ChemistryLecture #BoardExamPreparation