Why do atoms combine? Why are only certain combinations possible? Why do molecules possess definite shapes? To answer such questions different theories and concepts have been put forward from time to time. In this fourth unit of class 11 chemistry, we can answer the above questions by learning Kössel-Lewis approach, Valence Shell Electron Pair Repulsion (VSEPR) Theory, Valence Bond (VB) Theory and Molecular Orbital (MO) Theory.
Curated by: Khan Academy India - English (42 videos)
Understand hybridisation like never before! This video unpacks the logic and beauty behind sp, sp², and sp³ hybridisation, using real molecular examples like BeH₂, BCl₃, and CH₄. Let's explore how hybridisation explains why some elements form more bonds than what would be expected from their valence electronic configurations. From linear to trigonal planar to tetrahedral, every geometry is explained with clarity and visual depth. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/class-11-chemistry-india/xfbb6cb8fc2bd00c8:in-in-chemical-bonding-and-molecular-structure?lang=en Timestamps: 0:00 - Recap of Hybridisation 00:30 - Agenda 00:45 - sp hybridisation 2:46 - Example of sp hybridisation- BeH2 4:21 - Why excitation is needed during hybridisation? 7:20 - sp2 hybridisation 8:34 - Example of sp2 hybridisation- BCl3 10:34 - sp3 hybridisation 11:42 - Example of sp3 hybridisation- CH4 Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Nitika Duggal