The one that is NOT suitable for the removal of permanent hardness of water is :
Solution
For Removal of Temporary hardness two methods are present
<br>(1) Clark’s method
<br>(2) Boiling
<br><br>While permanent hardness of water can be
removed 4 methods
<br>(1) Washong soda method (Na<sub>2</sub>CO<sub>3</sub> method),
<br>(2) Calgon method
<br>(3) Permutit Process
<br>(4) Ion-exchange Resin method.
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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