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Synthetic detergents are more effective in hard water than soaps because

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They are highly soluble in water

Their ${Ca}^{+ +} and {Mg}^{+ +}$ salts are insoluble in water

None of these

answer is B.

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Detailed Solution

Hard water does not produce lather with soap because the cations $({Ca}^{2 +} and {Mg}^{2 +})$ present in hard water react with soap to form insoluble precipitates. Detergent· form water soluble calcium and magnesium salt .

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