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Soap forms less lather in which type of water?

Answer and explanation

Correct answer: Hard water

Soap produces less lather in hard water because hard water contains dissolved calcium and magnesium ions. These ions react with the fatty-acid salts of soap and form an insoluble substance called scum, which is not useful for cleaning. Soft, distilled, and usually rainwater contain far fewer such ions, so soap can form lather more easily. Therefore, option A is correct.

Related tags

Hard WaterSoapLatherCalcium And MagnesiumSoaps And DetergentsCarbon And Its CompoundsScienceClass 10 Mcq

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