Which of the following statement is false about hardness of water

Easy

A

Bicarbonates of calcium and magnesium are responsible for temporary hardness of water
B

Clarke's process is useful to remove permanent hardness of water
C

Deionized water is obtained when water is passed through both cation exchange resin and anion exchange resin.
D

Washing soda can remove both temporary and permanent hardness of water

Solution

Clarke's process removes only temporary hardness of water.
$Ca {(OH)}_{2}$ is the reagent used. It precipitates $Mg {({HCO}_{3})}_{2} as Mg {(OH)}_{2} and Ca {({HCO}_{3})}_{2} as {CaCO}_{3} .$

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