The Method that is NOT suitable for the removal of permanent hardness of water

The Method that is NOT suitable for the removal of permanent hardness of water

  1. A

    Treatment with sodium carbonate       

  2. B

    Clarke’s method

  3. C

    Ion-exchange method    

  4. D

    Calgon’s method

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    Solution:

    Clarke’s method of using limited lime water is used to remove temporary hardness of water, It cant remove permanent hardness of water.

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