Detergents are better than soaps for washing in hard water because

Kingsley Thompson August 10, 2025

 Detergents are better than soaps for washing in hard water because

A. hard water contains insoluble calcium salts.
B. they contain bleaching powder.
C. they contain palmitic acid.
D. they do not form insoluble calcium and magnesium salts.
E. they are organic compounds.

The correct answer is D. they do not form insoluble calcium and magnesium salts.

Explanation: Soap form scum with water due to the presence of calcium and magnesium ion which do not occur with detergent.

SOURCE: NECO CHEMISTRY 2001 QUESTION 15

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Kingsley Thompson

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