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Explain the formation of scum when hard water is treated with soap.
Why are detergents better cleansing agents than soaps? Explain.
You want to test for hardness of water but hard water is not available in the laboratory. Which of the following compounds may be dissolved in pure water to make it hard ?
Write the major three difference between soap and detergent.
Take two test tubes X and Y with 10 mL of hard water in each. In test tube 'X', add few drops of soap solution and in test tube Y add a few drops of detergent solution. Shake both the test tubes for the same period. (a) In which test tube the formation of foam will be more ? Why? (b) In which test tube is a curdy solid formed? Why?
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