1350Chemical EngineeringMedium
Soap cannot be used with hard water, because ________?
AHard water contains sulphate
BThey form insoluble calcium soaps which precipitate
CNone of these
DThey attract back the removed dirt
Correct answer
B. They form insoluble calcium soaps which precipitate
Explanation
The correct answer is They form insoluble calcium soaps which precipitate.