https://www.khanacademy.org/science/shs-physical-science/x0492729e402f0c6b:unit-1-name/x0492729e402f0c6b:chemistry-in-household-and-personal-care-products/v/baking-soda-acids-bases-and-salts-chemistry-khan-academy 2020-07-21T06:02:35Z Baking soda Let's see how is baking soda formed and what are its uses. Ram Prakash video https://cdn.kastatic.org/googleusercontent/pNNEe5ZtQde0LQdA9Bg3p2LPPIZAMcwFpz4Gq9aEbYJu4tK1RrMwWi-bpvk7M0fucI6xzxROVxQut0lBvHYZe1U Baking soda Let's see how is baking soda formed and what are its uses. https://cdn.kastatic.org/ka-youtube-converted/UHRIptTczTI.mp4/UHRIptTczTI.mp4 466 Substances in Common Use https://www.khanacademy.org/science/shs-physical-science/x0492729e402f0c6b:unit-1-name/x0492729e402f0c6b:chemistry-in-household-and-personal-care-products/v/bleaching-powder-acids-bases-and-salts-chemistry-khan-academy 2020-07-21T06:02:27Z Bleaching powder Let's see how bleaching powder is made and where it's used. Ram Prakash video https://cdn.kastatic.org/googleusercontent/Cmc5Dk2wkWBh9IaB4Rpg4CFE1gzAfvA-hVvxdMehiTugZkieboCZvcjM9EUS2CD0BgrMNdirjavSxnsyOyehEBc Bleaching powder Let's see how bleaching powder is made and where it's used. https://cdn.kastatic.org/ka-youtube-converted/eKqiGlf4XhU.mp4/eKqiGlf4XhU.mp4 374 Substances in Common Use https://www.khanacademy.org/science/shs-physical-science/x0492729e402f0c6b:unit-1-name/x0492729e402f0c6b:chemistry-in-household-and-personal-care-products/v/washing-soda 2020-07-21T06:02:26Z Washing soda Let's see how is washing soda formed and what are its uses. video https://cdn.kastatic.org/googleusercontent/dae_bNyKBRs1LzN8bi0q1VvyO4Uh2TftCcN4IW3UbMTRyLESAFwkzaixW5Rd2E96McOtXaMU5gbER6BCZEkCfBM Washing soda Let's see how is washing soda formed and what are its uses. https://cdn.kastatic.org/ka-youtube-converted/SsUemSnD_-M.mp4/SsUemSnD_-M.mp4 385 Substances in Common Use https://www.khanacademy.org/science/bmc-grade-9-science/x345505a97fc4a662:substances-in-daily-use/x345505a97fc4a662:radioactivity/e/alpha-beta-gamma-rays 2025-12-18T18:40:53.641757593Z Alpha, Beta, Gamma rays This exercise builds understanding of alpha, beta, and gamma radiations through fact-based and conceptual questions. Students explore their nature, charge, mass, penetrating power, and behavior in fields using MCQs, True/False items, and matchers. Yajurva Joshi exercise 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 Substances in Common Use 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 https://www.khanacademy.org/science/telangana-class-10-physical-sciencein/x1ac9c643dc8dffee:structure-of-atom/x1ac9c643dc8dffee:electromagnetic-spectrum/e/the-electromagnetic-spectrum-quiz 2021-06-05T01:54:18Z The electromagnetic spectrum quiz Try this quiz about the electromagnetic spectrum. NOVA exercise