1.

Statement I : Hard water does not give lather with soap . Statement II : Calcium and magnesium salts present in hard water form precipitate with soap .

Answer»

Both the statements individually true and Statement II is the correct explanation of Statement I.
Both the statements are individually true but Statement II is not correct explanation of Statement I.
Statement I is true but Statement II is false .
Statement I is false but Statement II is true .

SOLUTION :When hard water is beated with soap solution , `Ca^(++)` and `Mg^(++)` ions present in hard water react with anions of fatty acids present in SOAPS to form SCUM or precipitate . As a RESULT , hard water does not PRODUCE lather with soap .


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