https://www.khanacademy.org/science/bmc-grade-9-science/x345505a97fc4a662:substances-in-daily-use/x345505a97fc4a662:dyes/v/dye 2026-02-09T06:51:45.841078978Z Dye Where does colour come from, and why doesn’t it wash away? This video takes students on a colourful journey — from festival clothes and Rang Panchami powders to the science behind dyes. It explains how dyes work, why water alone cannot fix colour on fabric, and how mordants help dyes bond permanently with fibres. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Dye Where does colour come from, and why doesn’t it wash away? This video takes students on a colourful journey — from festival clothes and Rang Panchami powders to the science behind dyes. It explains how dyes work, why water alone cannot fix colour on fabric, and how mordants help dyes bond permanently with fibres. 371 Chemical substances in day to day life https://www.khanacademy.org/science/bmc-grade-9-science/x345505a97fc4a662:substances-in-daily-use/x345505a97fc4a662:dyes/e/dyes 2025-12-18T18:40:53.641757593Z Dyes This exercise develops factual understanding and basic conceptual clarity about dyes, including their nature, purpose, types, and how they color materials. It uses MCQs and matchers to strengthen core comprehension. Yajurva Joshi exercise