GK
BASIC GENERAL KNOWLEDGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Permanent hardness of water can be removed by adding
|
|
bleaching powder
|
|
|
chlorine
|
|
|
washing soda
|
|
|
potassium permanganate
|
Explanation:
Detailed explanation-1: -Sodium carbonate, Na2CO3 is also known as washing soda. It can remove temporary and permanent hardness from water. It is soluble in water and adds a large amount of carbonate ions to the water. These react with dissolved calcium and magnesium ions in the water to produce insoluble precipitates.
Detailed explanation-2: -Removal of hardness of water Chemical Process of Boiling Hard Water. Adding Slaked Lime (Clarkâs Process) Adding Washing Soda. Calgon Process.
There is 1 question to complete.