Single correct option
Which of the following statements is/are correct?
1. Soaps are sodium or potassium salts of long-chain fatty acids.
2. Soaps work well in hard water because they form soluble calcium salts.
1. Soaps are sodium or potassium salts of long-chain fatty acids.
2. Soaps work well in hard water because they form soluble calcium salts.
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (A) 1 only
Soaps are sodium or potassium salts of fatty acids made by saponification, so statement 1 is right. In hard water the calcium and magnesium ions form insoluble scum with soap, so soaps work poorly there; statement 2 is wrong.
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