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Alcohols, Phenols and Ethers Class 12 Notes – Reactions, Properties, NCERT Solutions & CBSE Guide 2025-26

Unit 11 – Alcohols, Phenols and Ethers 11.1 Classification 11.2 Nomenclature 11.3 Structures of Functional Groups 11.4 Alcohols and Phenols 11.5 Some Commercially Important Alcohols 11.6 Ethers I. Introduction to Alcohols, Phenols, and Ethers Alcohols and phenols are formed when one or more hydrogen atoms in a hydrocarbon (aliphatic and aromatic, respectively) are replaced by a hydroxyl (-OH) group . These compounds are fundamental for various applications in industry and daily life, such as detergents, antiseptics, and fragrances. For instance, ethanol, a hydroxyl-containing compound, is the main component of spirit used for polishing wooden furniture. Sugar, cotton, and paper also consist of compounds with -OH groups. This unit specifically discusses the chemistry of alcohols, phenols, and ethers. II. Classification Alcohols, phenols, and ethers are classified to facilitate systematic study. A. Alcohols Alcohols are classified based on the number of hydroxyl groups and the hybr...

The Human Eye and the Colourful World Class 10 Notes | CBSE Science Chapter 11 (2025–26)

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  The Human Eye and the Colourful World Class 10 Notes Attention Class 10 students! Chapter 11 – "The Human Eye and the Colourful World" is not just about vision—it's your gateway to mastering one of the most intriguing topics in CBSE Science. From understanding how our eyes work to exploring the science behind rainbows and sunsets, these NCERT-based notes are designed to simplify complex concepts and boost your exam readiness for 2024–25. Get set to explore the wonders of light, refraction, and the vibrant world around you—let’s begin the journey! Subject Science Class 10 Board CBSE & State Boards Chapter No. 10 Chapter Name The Human Eye and the Colourful World Type Notes Session 2025-26 Table of Contents The Human Eye Power of Accommodation Defects of Vision and Their Correction 1. Myopia 2. Hypermetropia 3. Presbyopia Refraction of Light Through a Prism Dispersion of White Light by a Glass Prism Recombination of White Light Rainbow Formation Atmospheric Refraction...