TOP 10 Questions (20 Yrs PYQ) Chemical Reactions & Equations | Class 10 Science | Most Repeated PYQs

Are you preparing for your Class 10 Board Exams? In this video, I break down the 10 most repeated questions from the chapter "Chemical Reactions and Equations" based on the last 20 years of Board PYQs (Previous Year Questions). ​Mastering these specific questions is a game-changer for your preparation. I provide step-by-step solutions, explain the underlying concepts, and teach you how to write answers in the exam to score maximum marks. ​In this video, you will learn: ✅ Detailed solutions for the most frequent Board Exam questions. ✅ How to identify reactions and write balanced chemical equations correctly. ✅ Important observation-based questions. ✅ Tips to avoid common mistakes that cost students marks. ​Timestamps: 00:00:00 - Introduction 00:00:40 - Decomposition of Lead Nitrate 00:04:27 - Slaking of Lime (Exothermic Reaction) 00:06:57 - Electrolysis of Water 00:12:43 - Photolytic Decomposition of Silver Chloride 00:15:58 - Oxidation of Copper (Shiny Brown Element X) 00:20:05 - Displacement Reaction (Iron Nails & Copper Sulfate) 00:25:49 - Double Displacement Reaction (Lead Nitrate & KI) 00:30:01 - Redox Reactions (Oxidation & Reduction) 00:34:06 - Balancing Chemical Equations (Important Practice) 00:36:00 - Cellular Respiration (Why it is Exothermic) ​📌 Recommended: Check out my "One-Shot" video on this chapter for a deeper understanding of the concepts mentioned here. ​🔔 Subscribe to Chemistron for more board preparation videos, tips, and tricks to ace your Science exams! ​#Class10Science #ChemicalReactions #BoardExams2026 #PYQ #CBSEClass10 #Chemistry #StudyTips #BoardExamPreparation #ScienceClass10 ​#Chemistry #BoardExams #ScienceImportantQuestions #Class10Science #ChemistryClass10 #PreviousYearQuestions #StudyTips #RedoxReaction