Question

If a boiled and filtered hard water is added to soap and it lathers, the water is :

• A. temporary hard water
• B. permanent hard water
• C. both a and b
• D. data insufficient

Answer 1

The correct option is A temporary hard water

Hardness of water can be of two types temporary and permanent hardness. Temporary hard water contains only bicarbonates of magnesium and calcium. It can be removed by boiling. Such water on treating with soap lathers easily.