{:(,"Column A",,,"Column B"),(A.,"Removal of hardness by boiling","()",a.,"Resins"),(B.,"Clark's method","()",b.,"Can remove temporary and permanent hardness"),(C.,"Addition of washing soda","()",c.,"Decomposition reaction"),(D.,"Ion exchange method","()",d.,"Addition of slaked lime"):}

{:(,"Column A",,,"Column B"),(A.,"Removal of hardness by boiling","()"

1.	{:(,"Column A",,,"Column B"),(A.,"Removal of hardness by boiling","()",a.,"Resins"),(B.,"Clark's method","()",b.,"Can remove temporary and permanent hardness"),(C.,"Addition of washing soda","()",c.,"Decomposition reaction"),(D.,"Ion exchange method","()",d.,"Addition of slaked lime"):}
Answer» Solution :By the process of boiling we can remove temporary hardness in which bicarbonates present in water decomposes to CARBONATES which are PRECIPITATED. Clark's method involves the addition of slaked lime to water either in solid or liquid form to remove temporary hardness. Addition of washing SODA helps in removing both temporary and PERMANENT hardness. Ion exchange method consists of solids called ion exchange resins.