Namaskar Doston, In this video, we've systematically discussed the preparation of alkyl halides with flow diagram & easiest way to understand and practice the reaction. Below are some important videos links : Basic Video: https://youtu.be/715NIioyesA https://youtu.be/u3ITi1t4hg4 Optical Theory - https://youtu.be/KZQl7svdxRk What is K2Cr2O7? : https://youtu.be/ge3oKxUMya4