UG TRB Chemistry | Mechanism in Aromatic Substitution | Important questions | part 3

#UGTRBChemistry #AromaticSubstitution #OrganicChemistry #ProfessorAcademy In this video, you will get a detailed and clear analysis of Mechanism in Aromatic Substitution (Part 3), explained from an exam-oriented perspective for the UG TRB Chemistry. This session focuses on deactivating groups, electrophilic substitution rules, and tricky carbocation rearrangements. #UGTRBChemistry #AromaticSubstitution #UGTRB2024 #BTAssistant #Chemistry #ProfessorAcademy Are you preparing for the UG TRB Chemistry exam? This video covers critical topics like the strength of deactivating groups, the role of acids and bases in nitration, and how to predict products in Friedel-Crafts alkylation when rearrangements occur. In this video, you will learn: Deactivating Groups: Identifying the most potent meta-directing deactivators like NO2, CN, and SO3H and understanding their reactivity order. The Chemistry of Nitration: A surprising look at why Nitric Acid acts as a Base while Sulphuric Acid acts as an Acid during the formation of the Nitronium ion. Carbocation Rearrangements: Why the reaction of Benzene with n-propyl chloride primarily yields Isopropyl Benzene (Cumene) instead of the straight-chain product. Stability Factors: Comparing Primary, Secondary, and Tertiary carbocation stability and its impact on final product formation. Reactivity Series: Step-by-step ranking of molecules like Aniline, Benzene, and Nitrobenzene in electrophilic substitution reactions. Substitution vs Addition: Why Arenes prefer substitution over addition to maintain their extra resonance stability. Temperature Effects: How changing the reaction temperature can shift the major product in Friedel-Crafts synthesis. 📌 UG TRB – Chemistry WhatsApp Community Further Updates, Notifications, Class Info & Guidance பெற கீழே உள்ள group-ல் Join ஆகுங்கள்: https://chat.whatsapp.com/DcKQD83BoTi... 🚀 UG TRB 2026 – Online Course Details 💰 Course Fees: With Books: 12,000 Without Books: 9,000 💳 Payment Option: 3 Online Instalments 📅 Course Start Date: 8th February 2026 🌐 Medium: Bilingual (Tamil & English) ⏰ Class Timings (Recordings Available Anytime): Morning Batch: 5:00 AM – 6:30 AM Evening Batch: 6:30 PM – 10:30 PM 📝 Tests Included (200+ Tests): Daily Test | Weekly Test | Monthly Test | Half Portion Test | Full Portion Test 📲 To join the course, watch this guide:    • How to enroll course UG TRB 2026   📱 Professor Academy App – Enrol Now Play Store: https://play.google.com/store/apps/de... App Store: https://apps.apple.com/us/app/profess... 🔥 Why Choose Professor Academy? TRB / TET Experienced Chemistry Faculty Daily Live Classes + Recorded Access Concept-wise Study Materials & Model Tests Proven Results with 2300+ TET & 300+ PG TRB Qualifiers 📘 Explore More Resources UG TRB Courses: https://professoracademy.com/ug-trb/ UG TRB PYQ: https://professoracademy.com/ug-trb-pyq/ 📚 Syllabus: https://professoracademy.com/syllabus/ 🌐 Official Website: https://professoracademy.com/ 💬 Have Queries? Contact Us: 📞 Call / WhatsApp: 8807108794 | 7010531906 | 8124408794 | 7550100920 📧 Email: [email protected] 📝 Query Form: https://forms.gle/Hj7CHjgZ3C84sPFZ8 🎯 Concept-ஐ தெளிவாகப் புரிந்துகொண்டு TRB தேர்வில் வெற்றி பெறுங்கள்! 🔔 Subscribe for more technical sessions and TRB updates. 👍 Like, 💬 Comment & Share with fellow aspirants! 📌 Video Timestamps: 00:00:15 – Most Deactivating Meta-Directing Substituents 00:02:18 – Reactivity Chart: Activators vs Deactivators 00:04:12 – Nitric Acid as a Base in Nitration Mixture 00:05:46 – Formation of Nitronium Ion (NO2+) 00:07:57 – Electrophilic Substitution vs Addition in Arenes 00:08:40 – Friedel-Crafts Alkylation: n-Propyl Chloride Reaction 00:10:44 – Why Isopropyl Benzene (Cumene) is the Major Product 00:11:47 – Primary vs Secondary Carbocation Stability 00:14:15 – Effect of Temperature on Product Yield 00:14:58 – Order of Reactivity: Aniline vs Benzene vs Nitrobenzene #UGTRB #UGTRBChemistry #AromaticSubstitution #OrganicChemistry #ProfessorAcademy #TRBCoaching #BTAssistant #CarbocationRearrangement #NitrationMechanism #ChemistryMCQs