White patches are formed due to sweat, which contains water and salts that the body removes as waste products.
Chapter 10 Living Creatures: Exploring their Characteristics
Class VI NCERT Book Curiosity Science
What causes white patches on shirts around the armpits during summers?
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White patches on shirts around the armpits during summers are caused by a reaction between sweat and antiperspirants containing aluminum compounds. The aluminum mixes with sweat salts, leaving behind white stains on fabric.
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