Which one of the following is not a method to remove permanent hardness of water?
- AClark's method
- BCalgon's method
- CIon-exchange method
- DSynthetic resins method
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Similar Questions
Match List-$I$ with List-$II$ and select the correct answer using the codes given below.
List-$I$ List-$II$ $1.$ Heavy water $(a)$ Bicarbonates of $Ca$ and $Mg$ in water $2.$ Temporary hard water $(b)$ No foreign ions in water $3.$ Soft water $(c)$ $D_2O$ $4.$ Permanent hard water $(d)$ Sulphates and chlorides of $Ca$ and $Mg$ in water
| List-$I$ | List-$II$ |
| $1.$ Heavy water | $(a)$ Bicarbonates of $Ca$ and $Mg$ in water |
| $2.$ Temporary hard water | $(b)$ No foreign ions in water |
| $3.$ Soft water | $(c)$ $D_2O$ |
| $4.$ Permanent hard water | $(d)$ Sulphates and chlorides of $Ca$ and $Mg$ in water |
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