Which of the following statement is true?
Correct answer: C. Soap is used only in soft water while detergent can be used in soft as well as hard water
- A. Soaps and detergents both are used only in soft water
- B. Soaps and detergents both are used in soft as well as hard water.
- C. Soap is used only in soft water while detergent can be used in soft as well as hard water
- D. Detergent is used only in soft water while soap is used in soft and hard water, both
Explanation
Sodium-potassium ions that are present in the ionic part of soap form scum with calcium and magnesium ions of hard water and get precipitated whereas calcium and magnesium salts of detergent are soluble in water. Thus soap forms lather only in soft water whereas detergent forms lather in both soft and hard water.
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