Stop guessing and start solving! The biggest challenge in the "Haloalkanes and Haloarenes" chapter is deciding whether a reaction proceeds via the SN1 or SN2 mechanism. In this video, I give you a crystal-clear framework to judge the reactivity of Alkyl Halides for JEE Main and Advanced. We break down the competition between Substitution Nucleophilic Unimolecular (SN1) and Bimolecular (SN2) reactions using simple logic and tricks. 🚀 What you will learn in this video: • The Core Difference: Understanding the 2-step Carbocation pathway (SN1) vs. the 1-step Backside Attack (SN2). • The 4 Deciding Factors: How to analyze the Substrate (1°/2°/3°), Nucleophile Strength, Solvent Type (Polar Protic vs. Aprotic), and Leaving Group ability. • Reactivity Orders: Why $3^\circ - 2^\circ - 1^\circ$ for SN1 and $1^\circ - 2^\circ - 3^\circ$ for SN2. • Stereochemistry: Racemization vs. Inversion of configuration explained simply. • JEE Special Examples: Solving tricky cases involving allylic and benzylic halides. 📚 Key Concepts Covered: • Haloalkanes and Haloarenes Class 12 • Nucleophilic Substitution Reactions • Carbocation Stability vs. Steric Hindrance 🕒 Timestamps: 0:00 - Introduction: The SN1 vs SN2 Dilemma 1:45 - SN2 Mechanism Explained (Backside Attack) 4:30 - Factors Favoring SN2 (Steric Hindrance) 7:15 - SN1 Mechanism Explained (Carbocation) 10:50 - Factors Favoring SN1 (Stability) 14:20 - The Ultimate Comparison Table & Tricks 18:00 - Solving JEE Previous Year Questions (PYQs) 💡 Important Note for JEE Aspirants: Mastering this concept is crucial because it forms the basis for understanding Elimination reactions (E1/E2) and solving complex multi-step organic synthesis problems in the exam. 👇 Comments Question: Which solvent favors SN1 reactions more: Water ($H_2O$) or Acetone ($CH_3COCH_3$)? Let me know your answer below!