Question

______ give lather even with hard water due to the formation of________

• A. Soaps, soluble salts
• B. Detergents, soluble salts
• C. Detergents, insoluble salts
• D. Soaps, insoluble precipitates

Answer 1

The correct option is C Detergents, insoluble salts

Detergents give lather even with hard water their $Ca$ and $Mg$ salts are ionic in nature and therefore soluble in water. These salts of soap are covalent and form an insoluble precipitate in hard water.

Hence, the correct option is $\text{C}$