Скачать или смотреть UG TRB Chemistry | Dyes and Polymer | Important Question Discussion

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In this session, we provide a detailed and exam-oriented discussion on Dyes and Polymers, specifically curated for the UG TRB Chemistry 2026 examination. This video focuses on high-weightage questions, covering chemical bonding in dyes, pH indicators, and their practical applications in the textile industry.

🎯 What You Will Learn in This Video:
✅ Reactive Dyes & Fiber Bonding: A comprehensive look at how reactive dyes interact with cellulosic fibers. Understand the mechanism of forming stable Covalent Bonds with hydroxyl (-OH) groups in alkaline conditions to achieve superior wash-fastness.

✅ Indicator Chemistry & pH Transitions: Deep dive into the chemistry of Methyl Orange. Learn why it is a preferred indicator for acid-base titrations and how its molecular structure changes to reflect different colors across the pH scale.

✅ Colorimetric Analysis: Clear identification of color changes in various media—recognizing the transition from Red in acidic environments to Yellow in alkaline and neutral solutions.

✅ Structural Classification of Dyes: Detailed insights into the chemical frameworks of important dye classes, including Triphenyl Methane dyes, and their specific industrial applications.

✅ Exam-Oriented Question Discussion: Analysis of high-weightage topics and frequently asked questions from an exam perspective to help you target a 120+ score.

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📌 Video Timestamps:
00:00:00 – Introduction to Dyes and Polymers Discussion

00:00:22 – Reactive Dyes: Covalent Bonding with Cellulosic Fibers (Cotton)

01:02:46 – Structure of Triphenyl Methane Dyes

01:03:04 – Methyl Orange: Preparation and Indicator Properties

01:03:26 – pH-Dependent Color Changes: Acidic vs. Alkaline Media

01:03:55 – Indicator Summary and Application Charts

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