railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Chemistry Periodic Table
Which of the following statements about the cleansing action of soap is correct?
1. Soaps are ammonium salts of long chain carboxylic acids.
2. Soap forms insoluble precipitates with the calcium and magnesium ions in hard water.
1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2